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• 
  Species: Pseudoplatystoma punctifer
  Caption: P. tigrinum (above) and P. punctifer
• 
  Species: Tatia dunni
  Caption: Pair
• 
  Species: Mystus gulio
  Caption: Pair
• 
  Species: Aspidoras sp. (C035)
  Caption: Pair
• 
  Species: Ancistrus cf. cirrhosus
  Caption: Pair
• 
  Species: Hisonotus aky
  Caption: Pair
• 
  Species: Pseudohemiodon apithanos
  Caption: Pair
• 
  Species: Rineloricaria sp. `BARCELOS`
  Caption: Pair
• 
  Species: Rineloricaria teffeana
  Caption: Pair
• 
  Species: Mystus vittatus
  Caption: Pair - female above
• 
  Species: Pseudomystus siamensis
  Caption: Pair - female above
• 
  Species: Pseudomystus siamensis
  Caption: Pair - female above
• 
  Species: Agamyxis pectinifrons
  Caption: Pair - female above
• 
  Species: Brachyrhamdia sp. (1)
  Caption: Pair - female above
• 
  Species: Goeldiella eques
  Caption: Pair - female above
• 
  Species: Synodontis notatus
  Caption: Pair - female above
• 
  Species: Pseudopimelodus bufonius
  Caption: Pair - female above
• 
  Species: Schilbe intermedius
  Caption: Pair - female above
• 
  Species: Auchenipterichthys coracoideus
  Caption: Pair - female below
• 
  Species: Megalechis picta
  Caption: Pair - female below
• 
  Species: Chrysichthys brachynema
  Caption: Pair - female below
• 
  Species: Megalodoras uranoscopus
  Caption: Pair - female below
• 
  Species: Rineloricaria lanceolata
  Caption: Pair - female below
• 
  Species: Sturisoma barbatum
  Caption: Pair - female below
• 
  Species: Sturisomatichthys reinae
  Caption: Pair - female below
• 
  Species: Synodontis pleurops
  Caption: Pair - female below
• 
  Species: Ompok eugeneiatus
  Caption: Pair - female below
• 
  Species: Delturus sp. (1)
  Caption: Pair - female in foregound
• 
  Species: Amaralia hypsiura
  Caption: Pair - female on left
• 
  Species: Synodontis lucipinnis
  Caption: Pair - female on left
• 
  Species: Ancistrus ranunculus
  Caption: Pair - female on right
• 
  Species: Corydoras(ln7) venezuelanus
  Caption: Pair - female to rear
• 
  Species: Synodontis sp. `POLLI WHITE`
  Caption: Pair - female to right
• 
  Species: Synodontis sp. `POLLI WHITE`
  Caption: Pair - female to right
• 
  Species: Hypancistrus zebra
  Caption: Pair - female top
• 
  Species: Peckoltia lujani
  Caption: Pair - male on right
• 
  Species: Peckoltia lujani
  Caption: Pair - male on top
• 
  Species: Cetopsis sandrae
  Caption: Pair - male to front
• 
  Species: Panaqolus dentex
  Caption: Pair (female - right)
• 
  Species: Peckoltia sabaji
  Caption: Pair (female - right)
• 
  Species: Hypancistrus debilittera
  Caption: Pair (female right)
• 
  Species: Corydoras(ln6) diphyes
  Caption: Pair (female to left)
• 
  Species: Corydoras(ln9) sp. (C121)
  Caption: Pair (female to left)
• 
  Species: Ageneiosus magoi
  Caption: Pair (female, left)
• 
  Species: Ancistrus dolichopterus
  Caption: Pair (Male center)
• 
  Species: Pseudohemiodon sp. `MARBLED`
  Caption: Pair (male to right)
• 
  Species: Nannoptopoma sp. `PERU(1)`
  Caption: Pair (male, above) with eggs and older fry
• 
  Species: Lophiobagrus brevispinis
  Caption: Pair and offspring
• 
  Species: Clarias batrachus
  Caption: Pair at the spawning site
• 
  Species: Otocinclus cocama
  Caption: Pair cleaning leaves
• 
  Species: Megalechis picta
  Caption: Pair courting (female on right)
• 
  Species: Megalechis thoracata
  Caption: Pair during spawing
• 
  Species: Chaca chaca
  Caption: Pair feeding
• 
  Species: Rineloricaria parva
  Caption: Pair guarding eggs in foreground
• 
  Species: Hypancistrus zebra
  Caption: Pair in spawning cave
• 
  Species: Peckoltia sp. (L387)
  Caption: Pair in spawning cave
• 
  Species: Rineloricaria sp. (1)
  Caption: Pair in spawning cave
• 
  Species: Rineloricaria fallax
  Caption: Pair in spawning pipe with green eggs
• 
  Species: Corydoras(ln5) gracilis
  Caption: Pair laying eggs
• 
  Species: Panaqolus albivermis
  Caption: Pair prepare to spawn
• 
  Species: Corydoras(ln9) sterbai
  Caption: Pair spawning
• 
  Species: Scleromystax barbatus
  Caption: Pair spawning
• 
  Species: Hypancistrus sp. (L066)
  Caption: Pair spawning
• 
  Species: Rineloricaria fallax
  Caption: Pair spawning
• 
  Species: Rineloricaria platyura
  Caption: Pair spawning
• 
  Species: Ancistrus cf. cirrhosus
  Caption: Pair with eggs
• 
  Species: Rineloricaria parva
  Caption: Pair with eggs
• 
  Species: Aspidoras spilotus
  Caption: Pair-male above
• 
  Species: Tatia strigata
  Caption: Pair, female above
• 
  Species: Spectracanthicus zuanoni
  Caption: Pair, female above
• 
  Species: Corydoras(ln9) sp. (Cw127)
  Caption: Pair, female above.
• 
  Species: Corydoras(ln8sc4) condiscipulus
  Caption: Pair, female below
• 
  Species: Parancistrus nudiventris
  Caption: Pair, female below
• 
  Species: Corydoras(ln9) sp. (Cw111)
  Caption: Pair, female left
• 
  Species: Hypancistrus sp. (3)
  Caption: Pair, female left
• 
  Species: Pseudacanthicus spinosus
  Caption: Pair, female left
• 
  Species: Hypancistrus sp. (L173)
  Caption: Pair, female right
• 
  Species: Parotocinclus jumbo
  Caption: Pair, female right
• 
  Species: Rineloricaria eigenmanni
  Caption: Pair, female to left
• 
  Species: Rineloricaria parva
  Caption: Pair, female to left
• 
  Species: Ageneiosus polystictus
  Caption: Pair, female to right
• 
  Species: Tatia dunni
  Caption: Pair, female to right
• 
  Species: Hemiancistrus sp. (L128)
  Caption: Pair, female to right
• 
  Species: Panaqolus maccus
  Caption: Pair, gravid female to left
• 
  Species: Ancistrus sp. (L071)
  Caption: Pair, male above
• 
  Species: Hemiancistrus sp. (L128)
  Caption: Pair, male above
• 
  Species: Hypancistrus sp. (L270)
  Caption: Pair, male above
• 
  Species: Hypancistrus sp. (L340)
  Caption: Pair, male above
• 
  Species: Pseudacanthicus leopardus
  Caption: Pair, male above
• 
  Species: Pareutropius buffei
  Caption: Pair, male above
• 
  Species: Trichogenes claviger
  Caption: Pair, male above
• 
  Species: Corydoras(ln8sc3) pantanalensis
  Caption: Pair, male below
• 
  Species: Hemiancistrus sp. (L128)
  Caption: Pair, male below
• 
  Species: Chaca chaca
  Caption: Pair, male in cave
• 
  Species: Trachelyopterus fisheri
  Caption: Pair, male in foreground
• 
  Species: Corydoras(ln7) eques
  Caption: Pair, male in front, from Anori, Brazil
• 
  Species: Sorubim elongatus
  Caption: Pair, male lower
• 
  Species: Hypancistrus sp. (L270)
  Caption: Pair, male on left
• 
  Species: Peckoltia compta
  Caption: Pair, male on left
• 
  Species: Corydoras(ln7) sp. (Cw010)
  Caption: Pair, male on right
• 
  Species: Hypancistrus sp. (L070)
  Caption: Pair, male on right
• 
  Species: Hypancistrus sp. (L270)
  Caption: Pair, male on right
• 
  Species: Peckoltia sp. (L076)
  Caption: Pair, male on the right
• 
  Species: Tatia gyrina
  Caption: Pair, male to left
• 
  Species: Pseudancistrus barbatus
  Caption: Pair, male to left
• 
  Species: Leporacanthicus cf. galaxias(l240)
  Caption: Pair, male to the left
• 
  Species: Trachelyopterus galeatus
  Caption: Pale appearance if given white pipe to hide in
• 
  Species: Panaque nigrolineatus
  Caption: Pale colouration of previously normal individual
• 
  Species: Corydoras(ln9) concolor
  Caption: Pale stress colouration
• 
  Species: Corydoras(ln9) sp. (Cw047)
  Caption: Palumeu
• 
  Species: Leptoancistrus canensis
  Caption: Panama, Río Vistamares
• 
  Species: Trichomycterus striatus
  Caption: Panama, Río Vistamares
• 
  Species: Hypostomus cf. cochliodon
  Caption: Paraguay
• 
  Species: Hypostomus cochliodon
  Caption: Paraguay
• 
  Species: Synodontis ornatipinnis
  Caption: Paralectotype (BMNH 1899.11.27.33-34)
• 
  Species: Zaireichthys compactus
  Caption: Paratype
• 
  Species: Netuma patriciae
  Caption: Paratype
• 
  Species: Ageneiosus uranophthalmus
  Caption: Paratype
• 
  Species: Aspidoras menezesi
  Caption: Paratype
• 
  Species: Corydoras(ln1) orcesi
  Caption: Paratype
• 
  Species: Corydoras(ln8sc4) approuaguensis
  Caption: Paratype
• 
  Species: Leptodoras nelsoni
  Caption: Paratype
• 
  Species: Heteropneustes fuscus
  Caption: Paratype
• 
  Species: Rhinolekos arachas
  Caption: Paratype
• 
  Species: Pangasius silasi
  Caption: Paratype
• 
  Species: Pimelodus pantaneiro
  Caption: Paratype
• 
  Species: Microglanis garavelloi
  Caption: Paratype
• 
  Species: Microglanis nigripinnis
  Caption: Paratype
• 
  Species: Microglanis reikoae
  Caption: Paratype
• 
  Species: Creteuchiloglanis kamengensis
  Caption: Paratype
• 
  Species: Trichomycterus quintus
  Caption: Paratype
• 
  Species: Synodontis katangae
  Caption: Paratype (BMNH 1943.7.27.422)
• 
  Species: Corydoras(ln8sc3) geryi
  Caption: Paratype (of C. bolivianus)
• 
  Species: Glyptothorax scrobiculus
  Caption: Paratype, 112mm SL
• 
  Species: Microglanis maculatus
  Caption: Paratype, 20.5mm SL
• 
  Species: Microglanis reikoae
  Caption: Paratype, 23.6 mm SL
• 
  Species: Hypostomus velhomonge
  Caption: Paratype, 88mm SL
• 
  Species: Hypostomus multidens
  Caption: Paratype, dorsal view
• 
  Species: Microglanis garavelloi
  Caption: Paratype, dorsal view
• 
  Species: Paralithoxus mocidade
  Caption: Paratype, dorsal. Male.
• 
  Species: Ferrarissoaresia meridionalis
  Caption: Paratype, female
• 
  Species: Pareiorhaphis vetula
  Caption: Paratype, female, dorsal view
• 
  Species: Ferrarissoaresia meridionalis
  Caption: Paratype, female; Dorsal view
• 
  Species: Ferrarissoaresia meridionalis
  Caption: Paratype, female; Ventral view
• 
  Species: Hisonotus bockmanni
  Caption: Paratype, female. 23.2mm SL
• 
  Species: Paralithoxus mocidade
  Caption: Paratype, female. Photo by Haroldo Palo Jr.
• 
  Species: Gelanoglanis varii
  Caption: Paratype, male
• 
  Species: Paralithoxus mocidade
  Caption: Paratype, male.
• 
  Species: Microglanis garavelloi
  Caption: Paratype, ventral view
• 
  Species: Paralithoxus mocidade
  Caption: Paratype, ventral. Male.
• 
  Species: Synodontis lucipinnis
  Caption: Parents in spawning site
• 
  Species: Ancistomus spilomma
  Caption: Parque Estadual da Serra Azul, MT, Brazil
• 
  Species: Ancistomus spilomma
  Caption: Parque Estadual da Serra Azul, MT, Brazil
• 
  Species: Microglanis xylographicus
  Caption: Parque Estadual da Serra Azul, MT, Brazil
• 
  Species: Chaetostoma dermorhynchus
  Caption: Pastaza River drainage
• 
  Species: Chaetostoma dermorhynchus
  Caption: Pastaza River drainage
• 
  Species: Chaetostoma milesi
  Caption: Pectoral fin
• 
  Species: Acestridium dichromum
  Caption: Pectoral fin spine
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  Species: Acestridium triplax
  Caption: Pectoral fin spine
• 
  Species: Hypancistrus sp. (L316)
  Caption: Pectoral fin spine of female
• 
  Species: Microglanis iheringi
  Caption: Pectoral fin spine, dorsal view
• 
  Species: Microglanis iheringi
  Caption: Pectoral fin spine, dorsal view
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  Species: Microglanis parahybae
  Caption: Pectoral fin spine, dorsal view
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  Species: Microglanis poecilus
  Caption: Pectoral fin spine, dorsal view
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  Species: Microglanis poecilus
  Caption: Pectoral fin spine, dorsal view
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  Species: Microglanis secundus
  Caption: Pectoral fin spine, dorsal view
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  Species: Microglanis secundus
  Caption: Pectoral fin spine, dorsal view
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  Species: Microglanis variegatus
  Caption: Pectoral fin spine, dorsal view
• 
  Species: Microglanis berbixae
  Caption: Pectoral fin spine, dorsal view. Bar = 1mm
• 
  Species: Microglanis carlae
  Caption: Pectoral fin spine, dorsal view. Bar = 1mm
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  Species: Microglanis cottoides
  Caption: Pectoral fin spine, dorsal view. Bar = 1mm
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  Species: Microglanis garavelloi
  Caption: Pectoral fin spine, dorsal view. Bar = 1mm
• 
  Species: Microglanis leniceae
  Caption: Pectoral fin spine, dorsal view. Bar = 1mm
• 
  Species: Microglanis lundbergi
  Caption: Pectoral fin spine, dorsal view. Bar = 1mm
• 
  Species: Microglanis minutus
  Caption: Pectoral fin spine, dorsal view. Bar = 1mm
• 
  Species: Microglanis nigrolineatus
  Caption: Pectoral fin spine, dorsal view. Bar = 1mm
• 
  Species: Microglanis oliveirai
  Caption: Pectoral fin spine, dorsal view. Bar = 1mm
• 
  Species: Microglanis parahybae
  Caption: Pectoral fin spine, dorsal view. Bar = 1mm
• 
  Species: Microglanis pataxo
  Caption: Pectoral fin spine, dorsal view. Bar = 1mm
• 
  Species: Microglanis pleriqueater
  Caption: Pectoral fin spine, dorsal view. Bar = 1mm
• 
  Species: Microglanis reikoae
  Caption: Pectoral fin spine, dorsal view. Bar = 1mm
• 
  Species: Microglanis robustus
  Caption: Pectoral fin spine, dorsal view. Bar = 1mm
• 
  Species: Microglanis sparsus
  Caption: Pectoral fin spine, dorsal view. Bar = 1mm
• 
  Species: Microglanis xerente
  Caption: Pectoral fin spine, dorsal view. Bar = 1mm
• 
  Species: Microglanis xylographicus
  Caption: Pectoral fin spine, dorsal view. Bar = 1mm
• 
  Species: Microglanis zonatus
  Caption: Pectoral fin spine, dorsal view. From Eigenmann & Allen
• 
  Species: Microglanis maculatus
  Caption: Pectoral fin spine, dorsal view. Holotype & paratype.
• 
  Species: Microglanis pellopterygius
  Caption: Pectoral fin spine, dorsal view. Variation.
• 
  Species: Pseudacanthicus pitanga
  Caption: Pectoral fin spines
• 
  Species: Panaque cf. cochliodon`upper magdalena`
  Caption: Pectoral odontodes
• 
  Species: Leptorhamdia aspredinoides
  Caption: Pectoral spine, dorsal view
• 
  Species: Rhyacoglanis annulatus
  Caption: Pectoral spine, dorsal view
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  Species: Rhyacoglanis epiblepsis
  Caption: Pectoral spine, dorsal view. Bar = 2mm
• 
  Species: Rhyacoglanis paranensis
  Caption: Pectoral spine, dorsal view. Bar = 2mm
• 
  Species: Rhyacoglanis pulcher
  Caption: Pectoral spine, dorsal view. Bar = 2mm
• 
  Species: Rhyacoglanis seminiger
  Caption: Pectoral spine, dorsal view. Bar = 2mm
• 
  Species: Iheringichthys syi
  Caption: Pectoral spine. a, I. syi, b & c. other spp.
• 
  Species: Pseudecheneis nagalandensis
  Caption: Pelvic fin, showing presence of plicae
• 
  Species: Astroblepus praeliorum
  Caption: Peru, Ancash Region, Quebrada Palta, 11.4cm TL
• 
  Species: Chaetostoma spondylus
  Caption: Peru, Cajamarca Region, Quebrada Honda, 13.6cm TL
• 
  Species: Spatuloricaria puganensis
  Caption: Peru, Cajamarca Region, Rio Chotano, 20.5cm TL
• 
  Species: Trichomycterus punctulatus
  Caption: Peru, Cajamarca Region, Rio La Succha, 15.8cm TL
• 
  Species: Chaetostoma spondylus
  Caption: Peru, Cajamarca Region, Rio Paltic, 14.1cm TL
• 
  Species: Helogenes gouldingi
  Caption: Peru: Madre del dios
• 
  Species: Hypostomus luteus
  Caption: Phase 1 juvenile
• 
  Species: Hypostomus luteus
  Caption: Phase 1 juvenile
• 
  Species: Hypostomus luteus
  Caption: Phase 1 juvenile
• 
  Species: Hypostomus luteus
  Caption: Phase 1 juvenile
• 
  Species: Hypostomus luteus
  Caption: Phase 2
• 
  Species: Hypostomus luteus
  Caption: Phase 2 adult
• 
  Species: Hypostomus luteus
  Caption: Phase 2 adult
• 
  Species: Hypostomus luteus
  Caption: Phase 2 adult
• 
  Species: Hypostomus luteus
  Caption: Phase 2 adult
• 
  Species: Hypostomus luteus
  Caption: Phase 2 adult
• 
  Species: Hypostomus luteus
  Caption: Phase 2 adult
• 
  Species: Hypostomus luteus
  Caption: Phase 2/3 adult
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  Species: Hypostomus luteus
  Caption: Phase 3 Adult
• 
  Species: Duringlanis sp. `YAGUAS`
  Caption: Photo by Alvaro del Campo
• 
  Species: Ancistrus martini
  Caption: Photo, Nathan Lujan
• 
  Species: Cambeva cubataonis
  Caption: Photo: A.M. Katz
• 
  Species: Chaetostoma marginatum
  Caption: Photo: Eduardo Rebolledo
• 
  Species: Astroblepus cyclopus
  Caption: Photo: Fredy Nugra
• 
  Species: Ancistrus patronus
  Caption: Photo: Nathan Lujan
• 
  Species: Ancistrus cf. cirrhosus
  Caption: Piebald variety
• 
  Species: Ancistrus cf. cirrhosus
  Caption: Piebald variety
• 
  Species: Ancistrus cf. cirrhosus
  Caption: Piebald variety
• 
  Species: Ancistrus cf. cirrhosus
  Caption: Piebald variety
• 
  Species: Ancistrus cf. cirrhosus
  Caption: Piebald variety
• 
  Species: Ancistrus cf. cirrhosus
  Caption: Piebald veiltail variety
• 
  Species: Phractocephalus hemioliopterus
  Caption: Platinum colour form
• 
  Species: Mystus vittatus
  Caption: Pondicherry, India
• 
  Species: Loricariichthys hauxwelli
  Caption: Posterior dorsal view
• 
  Species: Peckoltia compta
  Caption: Posterior half of female showing no odontode growth
• 
  Species: Peckoltia compta
  Caption: Posterior half of male showing odontode growth
• 
  Species: Pseudeutropius mitchelli
  Caption: Preserved colouration
• 
  Species: Glanidium ribeiroi
  Caption: Preserved specimen
• 
  Species: Satan eurystomus
  Caption: Preserved specimen
• 
  Species: Trogloglanis pattersoni
  Caption: Preserved specimen
• 
  Species: Pterygoplichthys multiradiatus
  Caption: Preserved specimen
• 
  Species: Lasiancistrus caucanus
  Caption: Preserved specimen - close-up of dorsal head view
• 
  Species: Glanidium ribeiroi
  Caption: Preserved specimen - close-up of head
• 
  Species: Lasiancistrus caucanus
  Caption: Preserved specimen - close-up of head
• 
  Species: Lasiancistrus caucanus
  Caption: Preserved specimen - Dorsal view
• 
  Species: Ailiichthys punctata
  Caption: Preserved specimen - lateral view
• 
  Species: Imparfinis guttatus
  Caption: Preserved specimen - lateral view
• 
  Species: Imparfinis stictonotus
  Caption: Preserved specimen - lateral view
• 
  Species: Phenacorhamdia boliviana
  Caption: Preserved specimen - lateral view
• 
  Species: Chaetostoma platyrhynchus
  Caption: Preserved specimen - lateral view
• 
  Species: Cordylancistrus torbesensis
  Caption: Preserved specimen - lateral view
• 
  Species: Hypoptopoma guianense
  Caption: Preserved specimen - lateral view
• 
  Species: Hypoptopoma gulare
  Caption: Preserved specimen - lateral view
• 
  Species: Hypoptopoma steindachneri
  Caption: Preserved specimen - lateral view
• 
  Species: Lasiancistrus caucanus
  Caption: Preserved specimen - lateral view
• 
  Species: Microglanis malabarbai
  Caption: Province of Corrientes, Argentina
• 
  Species: Microglanis malabarbai
  Caption: Province of Corrientes, Argentina
• 
  Species: Microglanis malabarbai
  Caption: Province of Corrientes, Argentina
• 
  Species: Microglanis malabarbai
  Caption: Province of Corrientes, Argentina
• 
  Species: Microglanis malabarbai
  Caption: Province of Corrientes, Argentina.
• 
  Species: Asterophysus batrachus
  Caption: Puffed up with water!
• 
  Species: Synodontis zambezensis
  Caption: Pungwe River, Gorongosa District Border
• 
  Species: Schilbe intermedius
  Caption: Pungwe River, Gorongosa District Border