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Species: Liobagrus marginatus Caption: Albino - close-up of head	Species: Malapterurus electricus Caption: Albino - close-up of head
Species: Synodontis soloni Caption: Albino - close-up of head	Species: Acrochordonichthys ischnosoma Caption: Close-up of head
Species: Acrochordonichthys strigosus Caption: Close-up of head	Species: Akysis prashadi Caption: Close-up of head
Species: Akysis prashadi Caption: Close-up of head	Species: Akysis recavus Caption: Close-up of head
Species: Akysis vespa Caption: Close-up of head	Species: Parakysis anomalopteryx Caption: Close-up of head
Species: Parakysis grandis Caption: Close-up of head	Species: Parakysis notialis Caption: Close-up of head
Species: Parakysis verrucosus Caption: Close-up of head	Species: Amblyceps cerinum Caption: Close-up of head
Species: Belonoglanis brieni Caption: Close-up of head	Species: Trachyglanis ineac Caption: Close-up of head
Species: Ariopsis felis Caption: Close-up of head	Species: Bagre marinus Caption: Close-up of head
Species: Bunocephalus coracoideus Caption: Close-up of head	Species: Bunocephalus verrucosus Caption: Close-up of head
Species: Platystacus cotylephorus Caption: Close-up of head	Species: Platystacus cotylephorus Caption: Close-up of head
Species: Pterobunocephalus depressus Caption: Close-up of head	Species: Xyliphius melanopterus Caption: Close-up of head
Species: Ageneiosus inermis Caption: Close-up of head	Species: Ageneiosus marmoratus Caption: Close-up of head
Species: Ageneiosus marmoratus Caption: Close-up of head	Species: Asterophysus batrachus Caption: Close-up of head
Species: Auchenipterichthys punctatus Caption: Close-up of head	Species: Auchenipterinae sp. (1) Caption: Close-up of head
Species: Auchenipterus nuchalis Caption: Close-up of head	Species: Centromochlus romani Caption: Close-up of head
Species: Centromochlus schultzi Caption: Close-up of head	Species: Liosomadoras morrowi Caption: Close-up of head
Species: Spinipterus acsi Caption: Close-up of head	Species: Tatia gyrina Caption: Close-up of head
Species: Tatia musaica Caption: Close-up of head	Species: Tatia simplex Caption: Close-up of head
Species: Tetranematichthys wallacei Caption: Close-up of head	Species: Tetranematichthys wallacei Caption: Close-up of head
Species: Trachelyopterus fisheri Caption: Close-up of head	Species: Trachelyopterus galeatus Caption: Close-up of head
Species: Austroglanis gilli Caption: Close-up of head	Species: Bagrichthys macracanthus Caption: Close-up of head
Species: Hemibagrus microphthalmus Caption: Close-up of head	Species: Hemibagrus wyckii Caption: Close-up of head
Species: Hemibagrus wyckii Caption: Close-up of head	Species: Leiocassis micropogon Caption: Close-up of head
Species: Mystus aff. gulio Caption: Close-up of head	Species: Mystus aff. gulio Caption: Close-up of head
Species: Mystus ankutta Caption: Close-up of head	Species: Mystus bocourti Caption: Close-up of head
Species: Mystus carcio Caption: Close-up of head	Species: Nanobagrus immaculatus Caption: Close-up of head
Species: Pseudomystus cf. stenomus Caption: Close-up of head	Species: Pseudomystus funebris Caption: Close-up of head
Species: Pseudomystus stenogrammus Caption: Close-up of head	Species: Rita kuturnee Caption: Close-up of head
Species: Sperata aor Caption: Close-up of head	Species: Tachysurus fulvidraco Caption: Close-up of head
Species: Corydoras aeneus Caption: Close-up of head	Species: Corydoras brevirostris Caption: Close-up of head
Species: Corydoras crimmeni Caption: Close-up of head	Species: Corydoras julii Caption: Close-up of head
Species: Corydoras narcissus Caption: Close-up of head	Species: Corydoras robineae Caption: Close-up of head
Species: Corydoras schultzei Caption: Close-up of head	Species: Corydoras semiaquilus Caption: Close-up of head
Species: Corydoras sp. (C141) Caption: Close-up of head	Species: Corydoras zygatus Caption: Close-up of head
Species: Megalechis thoracata Caption: Close-up of head	Species: Megalechis thoracata Caption: Close-up of head
Species: Cetopsis coecutiens Caption: Close-up of head	Species: Bathyclarias foveolatus Caption: Close-up of head
Species: Bathyclarias foveolatus Caption: Close-up of head	Species: Channallabes apus Caption: Close-up of head
Species: Channallabes apus Caption: Close-up of head	Species: Channallabes sp. (1) Caption: Close-up of head
Species: Channallabes sp. (1) Caption: Close-up of head	Species: Clarias alluaudi Caption: Close-up of head
Species: Clarias batrachus Caption: Close-up of head	Species: Clarias gariepinus Caption: Close-up of head
Species: Clarias platycephalus Caption: Close-up of head	Species: Gymnallabes typus Caption: Close-up of head
Species: Gymnallabes typus Caption: Close-up of head	Species: Gymnallabes typus Caption: Close-up of head
Species: Auchenoglanis wittei Caption: Close-up of head	Species: Chrysichthys dendrophorus Caption: Close-up of head
Species: Notoglanidium macrostoma Caption: Close-up of head	Species: Notoglanidium macrostoma Caption: Close-up of head
Species: Parauchenoglanis punctatus Caption: Close-up of head	Species: Phyllonemus filinemus Caption: Close-up of head
Species: Cranoglanis bouderius Caption: Close-up of head	Species: Diplomystes camposensis Caption: Close-up of head
Species: Agamyxis pectinifrons Caption: Close-up of head	Species: Amblydoras nauticus Caption: Close-up of head
Species: Anadoras grypus Caption: Close-up of head	Species: Anadoras weddellii Caption: Close-up of head
Species: Centrodoras brachiatus Caption: Close-up of head	Species: Centrodoras brachiatus Caption: Close-up of head
Species: Doras carinatus Caption: Close-up of head	Species: Hassar wilderi Caption: Close-up of head
Species: Hemidoras stenopeltis Caption: Close-up of head	Species: Orinocodoras eigenmanni Caption: Close-up of head
Species: Oxydoras niger Caption: Close-up of head	Species: Oxydoras niger Caption: Close-up of head
Species: Platydoras armatulus Caption: Close-up of head	Species: Pterodoras granulosus Caption: Close-up of head
Species: Rhinodoras armbrusteri Caption: Close-up of head	Species: Rhinodoras boehlkei Caption: Close-up of head
Species: Rhinodoras gallagheri Caption: Close-up of head	Species: Tenellus cristinae Caption: Close-up of head
Species: Gladioglanis anacanthus Caption: Close-up of head	Species: Gladioglanis machadoi Caption: Close-up of head
Species: Goeldiella eques Caption: Close-up of head	Species: Pimelodella sp. (2) Caption: Close-up of head
Species: Pimelodella sp. (3) Caption: Close-up of head	Species: Rhamdella aymarae Caption: Close-up of head
Species: Rhamdia quelen Caption: Close-up of head	Species: Ameiurus natalis Caption: Close-up of head
Species: Ictalurus furcatus Caption: Close-up of head	Species: Ictalurus punctatus Caption: Close-up of head
Species: Noturus insignis Caption: Close-up of head	Species: Acanthicus adonis Caption: Close-up of head
Species: Acanthicus adonis Caption: Close-up of head	Species: Acanthicus hystrix Caption: Close-up of head
Species: Acestridium gymnogaster Caption: Close-up of head	Species: Ancistomus sp. (L387) Caption: Close-up of head
Species: Ancistrus aff. ranunculus Caption: Close-up of head	Species: Ancistrus cf. cirrhosus Caption: Close-up of head
Species: Ancistrus sp. (2) Caption: Close-up of head	Species: Ancistrus sp. (L107) Caption: Close-up of head
Species: Ancistrus sp. `LOWER RIO NEGRO` Caption: Close-up of head	Species: Ancistrus temminckii Caption: Close-up of head
Species: Ancistrus triradiatus Caption: Close-up of head	Species: Aphanotorulus ammophilus Caption: Close-up of head
Species: Aphanotorulus ammophilus Caption: Close-up of head	Species: Aposturisoma myriodon Caption: Close-up of head
Species: Baryancistrus demantoides Caption: Close-up of head	Species: Baryancistrus sp. (L019) Caption: Close-up of head
Species: Baryancistrus sp. (L142) Caption: Close-up of head	Species: Chaetostoma dupouii Caption: Close-up of head
Species: Chaetostoma sp. (5) Caption: Close-up of head	Species: Chaetostoma sp. (5) Caption: Close-up of head
Species: Chaetostoma sp. (L455) Caption: Close-up of head	Species: Chaetostoma sp. (L457) Caption: Close-up of head
Species: Chaetostoma sp. `COLOMBIA` Caption: Close-up of head	Species: Corumbataia tocantinensis Caption: Close-up of head
Species: Crossoloricaria cephalaspis Caption: Close-up of head	Species: Dolichancistrus fuesslii Caption: Close-up of head
Species: Dolichancistrus fuesslii Caption: Close-up of head	Species: Farlowella amazonum Caption: Close-up of head
Species: Farlowella hahni Caption: Close-up of head	Species: Farlowella paraguayensis Caption: Close-up of head
Species: Farlowella vittata Caption: Close-up of head	Species: Harttia punctata Caption: Close-up of head
Species: Hemiancistrus subviridis Caption: Close-up of head	Species: Hemiloricaria cacerensis Caption: Close-up of head
Species: Hemiloricaria melini Caption: Close-up of head	Species: Hemiloricaria parva Caption: Close-up of head
Species: Hemiloricaria sp. (2) Caption: Close-up of head	Species: Hemiloricaria sp. (3) Caption: Close-up of head
Species: Hemiloricaria sp. (4) Caption: Close-up of head	Species: Hemiodontichthys acipenserinus Caption: Close-up of head
Species: Hisonotus chromodontus Caption: Close-up of head	Species: Hypancistrus contradens Caption: Close-up of head
Species: Hypancistrus inspector Caption: Close-up of head	Species: Hypancistrus sp. `LOWER RIO XINGU` Caption: Close-up of head
Species: Hypoptopoma cf. guentheri Caption: Close-up of head	Species: Hypoptopoma inexspectatum Caption: Close-up of head
Species: Hypoptopoma sp. `PERU(1)` Caption: Close-up of head	Species: Hypostomus aspidolepis Caption: Close-up of head
Species: Hypostomus bolivianus Caption: Close-up of head	Species: Hypostomus plecostomus Caption: Close-up of head
Species: Hypostomus regani Caption: Close-up of head	Species: Hypostomus regani Caption: Close-up of head
Species: Hypostomus scaphyceps Caption: Close-up of head	Species: Hypostomus soniae Caption: Close-up of head
Species: Hypostomus sp. (L245) Caption: Close-up of head	Species: Hypostomus sp. (L266) Caption: Close-up of head
Species: Hypostomus sp. (L360) Caption: Close-up of head	Species: Lasiancistrus heteracanthus Caption: Close-up of head
Species: Lasiancistrus sp. (L033) Caption: Close-up of head	Species: Leporacanthicus cf. galaxias(l240) Caption: Close-up of head
Species: Leporacanthicus galaxias Caption: Close-up of head	Species: Leporacanthicus heterodon Caption: Close-up of head
Species: Leporacanthicus joselimai Caption: Close-up of head	Species: Leporacanthicus sp. (L263) Caption: Close-up of head
Species: Loricaria luciae Caption: Close-up of head	Species: Loricariichthys anus Caption: Close-up of head
Species: Loricariichthys anus Caption: Close-up of head	Species: Loricariichthys platymetopon Caption: Close-up of head
Species: Megalancistrus parananus Caption: Close-up of head	Species: Metaloricaria paucidens Caption: Close-up of head
Species: Otocinclus flexilis Caption: Close-up of head	Species: Otocinclus vittatus Caption: Close-up of head
Species: Oxyropsis wrightiana Caption: Close-up of head	Species: Panaqolus albivermis Caption: Close-up of head
Species: Panaqolus maccus Caption: Close-up of head	Species: Panaqolus sp. (L002) Caption: Close-up of head
Species: Panaqolus sp. (L329) Caption: Close-up of head	Species: Panaqolus sp. (L397) Caption: Close-up of head
Species: Panaqolus sp. (L453) Caption: Close-up of head	Species: Panaqolus sp. (L453) Caption: Close-up of head
Species: Panaqolus sp. (L458) Caption: Close-up of head	Species: Panaque armbrusteri Caption: Close-up of head
Species: Panaque titan Caption: Close-up of head	Species: Paraloricaria commersonoides Caption: Close-up of head
Species: Paraloricaria vetula Caption: Close-up of head	Species: Parotocinclus jumbo Caption: Close-up of head
Species: Peckoltia braueri Caption: Close-up of head	Species: Peckoltia brevis Caption: Close-up of head
Species: Peckoltia compta Caption: Close-up of head	Species: Peckoltia sabaji Caption: Close-up of head
Species: Peckoltia sp. (L205) Caption: Close-up of head	Species: Peckoltia sp. `RIO NEGRO` Caption: Close-up of head
Species: Pseudacanthicus cf. leopardus Caption: Close-up of head	Species: Pseudacanthicus cf. spinosus Caption: Close-up of head
Species: Pseudacanthicus cf. spinosus Caption: Close-up of head	Species: Pseudacanthicus leopardus Caption: Close-up of head
Species: Pseudacanthicus leopardus Caption: Close-up of head	Species: Pseudacanthicus pirarara Caption: Close-up of head
Species: Pseudacanthicus sp. (L273) Caption: Close-up of head	Species: Pseudacanthicus sp. (LDA105) Caption: Close-up of head
Species: Pseudancistrus depressus Caption: Close-up of head	Species: Pseudohemiodon apithanos Caption: Close-up of head
Species: Pseudohemiodon apithanos Caption: Close-up of head	Species: Pseudohemiodon laticeps Caption: Close-up of head
Species: Pseudohemiodon sp. `PERU II` Caption: Close-up of head	Species: Pseudohemiodon sp. `PERU I` Caption: Close-up of head
Species: Pseudohemiodon sp. `PERU I` Caption: Close-up of head	Species: Pseudolithoxus anthrax Caption: Close-up of head
Species: Pseudolithoxus dumus Caption: Close-up of head	Species: Pseudolithoxus nicoi Caption: Close-up of head
Species: Pterosturisoma microps Caption: Close-up of head	Species: Pterosturisoma microps Caption: Close-up of head
Species: Pterygoplichthys pardalis Caption: Close-up of head	Species: Pterygoplichthys pardalis Caption: Close-up of head
Species: Pterygoplichthys sp. (L164) Caption: Close-up of head	Species: Pterygoplichthys weberi Caption: Close-up of head
Species: Rineloricaria aff. latirostris Caption: Close-up of head	Species: Rineloricaria felipponei Caption: Close-up of head
Species: Rineloricaria thrissoceps Caption: Close-up of head	Species: Scobinancistrus cf. pariolispos Caption: Close-up of head
Species: Scobinancistrus sp. (L082) Caption: Close-up of head	Species: Scobinancistrus sp. (L082) Caption: Close-up of head
Species: Scobinancistrus sp. (L082) Caption: Close-up of head	Species: Spatuloricaria sp. `RIO NANAY` Caption: Close-up of head
Species: Spatuloricaria sp. `RIO NANAY` Caption: Close-up of head	Species: Spatuloricaria sp. `RIO SAN ALEJANDRO` Caption: Close-up of head
Species: Squaliforma emarginata Caption: Close-up of head	Species: Sturisoma barbatum Caption: Close-up of head
Species: Sturisoma nigrirostrum Caption: Close-up of head	Species: Sturisoma nigrirostrum Caption: Close-up of head
Species: Sturisomatichthys leightoni Caption: Close-up of head	Species: Malapterurus electricus Caption: Close-up of head
Species: Malapterurus electricus Caption: Close-up of head	Species: Chiloglanis polypogon Caption: Close-up of head
Species: Chiloglanis pretoriae Caption: Close-up of head	Species: Euchilichthys guentheri Caption: Close-up of head
Species: Microsynodontis polli Caption: Close-up of head	Species: Mochokiella paynei Caption: Close-up of head
Species: Mochokiella paynei Caption: Close-up of head	Species: Synodontis acanthomias Caption: Close-up of head
Species: Synodontis batesii Caption: Close-up of head	Species: Synodontis caudalis Caption: Close-up of head
Species: Synodontis clarias Caption: Close-up of head	Species: Synodontis clarias Caption: Close-up of head
Species: Synodontis decorus Caption: Close-up of head	Species: Synodontis eupterus Caption: Close-up of head
Species: Synodontis irsacae Caption: Close-up of head	Species: Synodontis katangae Caption: Close-up of head
Species: Synodontis lucipinnis Caption: Close-up of head	Species: Synodontis macropunctatus Caption: Close-up of head
Species: Synodontis ocellifer Caption: Close-up of head	Species: Synodontis pardalis Caption: Close-up of head
Species: Synodontis petricola Caption: Close-up of head	Species: Synodontis robbianus Caption: Close-up of head
Species: Synodontis rukwaensis Caption: Close-up of head	Species: Synodontis schoutedeni Caption: Close-up of head
Species: Synodontis soloni Caption: Close-up of head	Species: Synodontis sorex Caption: Close-up of head
Species: Synodontis sp. hybrid(4) Caption: Close-up of head	Species: Synodontis sp. `LOWER GUINEA` Caption: Close-up of head
Species: Synodontis tanganaicae Caption: Close-up of head	Species: Synodontis vanderwaali Caption: Close-up of head
Species: Synodontis victoriae Caption: Close-up of head	Species: Synodontis xiphias Caption: Close-up of head
Species: Pangasianodon gigas Caption: Close-up of head	Species: Pangasius sanitwongsei Caption: Close-up of head
Species: Aguarunichthys torosus Caption: Close-up of head	Species: Brachyplatystoma filamentosum Caption: Close-up of head
Species: Calophysus macropterus Caption: Close-up of head	Species: Calophysus macropterus Caption: Close-up of head
Species: Leiarius marmoratus Caption: Close-up of head	Species: Leiarius marmoratus Caption: Close-up of head
Species: Luciopimelodus pati Caption: Close-up of head	Species: Parapimelodus sp. `MANAUS` Caption: Close-up of head
Species: Pimelodus ornatus Caption: Close-up of head	Species: Platysilurus mucosus Caption: Close-up of head
Species: Pseudoplatystoma fasciatum Caption: Close-up of head	Species: Pseudoplatystoma reticulatum Caption: Close-up of head
Species: Pseudoplatystoma reticulatum Caption: Close-up of head	Species: Neosilurus ater Caption: Close-up of head
Species: Neosilurus brevidorsalis Caption: Close-up of head	Species: Neosilurus brevidorsalis Caption: Close-up of head
Species: Plotosus papuensis Caption: Close-up of head	Species: Plotosus papuensis Caption: Close-up of head
Species: Lophiosilurus alexandri Caption: Close-up of head	Species: Pareutropius buffei Caption: Close-up of head
Species: Belodontichthys dinema Caption: Close-up of head	Species: Ceratoglanis scleronema Caption: Close-up of head
Species: Kryptopterus vitreolus Caption: Close-up of head	Species: Pterocryptis anomala Caption: Close-up of head
Species: Pterocryptis anomala Caption: Close-up of head	Species: Pterocryptis berdmorei Caption: Close-up of head
Species: Pterocryptis berdmorei Caption: Close-up of head	Species: Pterocryptis furnessi Caption: Close-up of head
Species: Silurus biwaensis Caption: Close-up of head	Species: Silurus triostegus Caption: Close-up of head
Species: Wallago attu Caption: Close-up of head	Species: Wallago attu Caption: Close-up of head
Species: Bagarius bagarius Caption: Close-up of head	Species: Creteuchiloglanis kamengensis Caption: Close-up of head
Species: Erethistes mesembrinus Caption: Close-up of head	Species: Gagata cenia Caption: Close-up of head
Species: Gagata gagata Caption: Close-up of head	Species: Glyptothorax anamalaiensis Caption: Close-up of head
Species: Glyptothorax decussatus Caption: Close-up of head	Species: Glyptothorax indicus Caption: Close-up of head
Species: Glyptothorax lanceatus Caption: Close-up of head	Species: Glyptothorax rugimentum Caption: Close-up of head
Species: Glyptothorax rugimentum Caption: Close-up of head	Species: Glyptothorax telchitta Caption: Close-up of head
Species: Glyptothorax zanaensis Caption: Close-up of head	Species: Gogangra viridescens Caption: Close-up of head
Species: Oreoglanis macroptera Caption: Close-up of head	Species: Pseudecheneis longipectoralis Caption: Close-up of head
Species: Pseudecheneis sp. (1) Caption: Close-up of head	Species: Pseudolaguvia ferula Caption: Close-up of head
Species: Pseudolaguvia ferula Caption: Close-up of head	Species: Pseudolaguvia flavida Caption: Close-up of head
Species: Henonemus triacanthopomus Caption: Close-up of head	Species: Ituglanis amazonicus Caption: Close-up of head
Species: Pareiodon sp. (1) Caption: Close-up of head	Species: Sarcoglanis simplex Caption: Close-up of head
Species: Trichomycterus alternatus Caption: Close-up of head	Species: Pterygoplichthys gibbiceps Caption: Close-up of head (adult)
Species: Neblinichthys pilosus Caption: Close-up of head (dorsal)	Species: Ancistrus sp. `RIO CHIRGUA` Caption: Close-up of head (front)
Species: Neblinichthys pilosus Caption: Close-up of head (lateral)	Species: Spatuloricaria caquetae Caption: Close-up of head (male)
Species: Brachyplatystoma rousseauxii Caption: Close-up of head (nose damaged)	Species: Neblinichthys pilosus Caption: Close-up of head (ventral)
Species: Farlowella sp. (1) Caption: Close-up of head - female	Species: Rineloricaria aff. latirostris Caption: Close-up of head - lateral view
Species: Chauliocheilos saxatilis Caption: Close-up of head / male lip morphology	Species: Leiarius pictus Caption: Close-up of head and dorsal fin
Species: Synodontis longirostris Caption: Close-up of head and humeral process-250 mm SL	Species: Otothyris lophophanes Caption: Close-up of head and suckermouth
Species: Hypancistrus sp. (L066) Caption: Close-up of head of female	Species: Hypancistrus sp. (L070) Caption: Close-up of head of female
Species: Panaqolus albivermis Caption: Close-up of head of female	Species: Leporacanthicus cf. galaxias(l241) Caption: Close-up of head of juvenile
Species: Ancistrus cf. cirrhosus Caption: Close-up of head of male	Species: Hemiancistrus sp. (L128) Caption: Close-up of head of male
Species: Hemiloricaria sp. (1) Caption: Close-up of head of male	Species: Hypancistrus furunculus Caption: Close-up of head of male
Species: Hypancistrus sp. (L066) Caption: Close-up of head of male	Species: Hypancistrus sp. (L070) Caption: Close-up of head of male
Species: Leporacanthicus cf. galaxias(l240) Caption: Close-up of head of male	Species: Leporacanthicus cf. galaxias`venezuela` Caption: Close-up of head of male
Species: Leporacanthicus galaxias Caption: Close-up of head of male	Species: Panaqolus albivermis Caption: Close-up of head of male
Species: Peckoltia sp. `RIO TOCANTINS` Caption: Close-up of head of male	Species: Rineloricaria sp. (L010A) Caption: Close-up of head of male
Species: Synodontis schoutedeni Caption: Close-up of head of male	Species: Ancistrus cf. cirrhosus Caption: Close-up of head of piebald male
Species: Parakysis notialis Caption: Close-up of head on view	Species: Centromochlus reticulatus Caption: Close-up of head on view
Species: Megalodoras uranoscopus Caption: Close-up of head showing ''third eye''	Species: Megalodoras uranoscopus Caption: Close-up of head showing ''third eye''
Species: Sturisomatichthys aureus Caption: Close-up of head showing cheek bristles	Species: Dekeyseria scaphirhyncha Caption: Close-up of head showing grooves
Species: Synodontis multipunctatus Caption: Close-up of head showing humeral process	Species: Astroblepus caquetae Caption: Close-up of head, Dorsal view
Species: Ancistrus lineolatus Caption: Close-up of head, Dorsal view	Species: Chaetostoma vagum Caption: Close-up of head, Dorsal view
Species: Cordylancistrus platyrhynchus Caption: Close-up of head, Dorsal view	Species: Hypostomus argus Caption: Close-up of head, Dorsal view
Species: Hypostomus niceforoi Caption: Close-up of head, Dorsal view	Species: Hypostomus oculeus Caption: Close-up of head, Dorsal view
Species: Rineloricaria felipponei Caption: Close-up of head, Dorsal view	Species: Rineloricaria pareiacantha Caption: Close-up of head, Dorsal view
Species: Hypancistrus sp. (L066) Caption: Close-up of head, male	Species: Astroblepus caquetae Caption: Close-up of head, Ventral view
Species: Hypoptopoma inexspectatum Caption: Close-up of head, ventral view	Species: Otocinclus mariae Caption: Close-up of head, ventral view
Species: Auchenoglanis senegali Caption: Close-up of head-110 mm SL	Species: Auchenoglanis cf. occidentalis Caption: Close-up of head-28 cm TL
Species: Sturisoma panamense Caption: Close-up of head-Southern Panama	Species: Hemiloricaria stewarti Caption: Close-up of head; Dorsal view
Species: Oxyropsis wrightiana Caption: Close-up of head; Dorsal view	Species: Pseudacanthicus pirarara Caption: Female - close-up of head
Species: Scobinancistrus sp. (L253) Caption: Female - close-up of head	Species: Hemiloricaria teffeana Caption: Male - close-up of head
Species: Scobinancistrus sp. (L253) Caption: Male - close-up of head	Species: Spatuloricaria sp. `RIO NANAY` Caption: Male, close-up of head
Species: Glanidium ribeiroi Caption: Preserved specimen - close-up of head	Species: Lasiancistrus caucanus Caption: Preserved specimen - close-up of head