Cat-eLog Right Arrow Loricariidae Right Arrow Hypostominae Right Arrow Ancistrus

Jump to next section Cat-eLog Data Sheet
Scientific NameAncistrus ranunculus  Muller, Py-Daniel & Zuanon, 1994
Common NamesL034, Medusa Pleco
Bredhovedet Sugemalle (Denmark), Kaulquappenwels/Bristle Bushmouth (Germany)
Type LocalityRio Xingú, furo do Tucum Seco, near Arroz Cru, Pará, Brazil
Pronunciationan SISS truss - rah nun kew luss
EtymologyThe name Ancistrus is derived from the Greek word agkistron, meaning hook, in reference to the interopercular odontodes that are hooked. This specific epithet literally means small frog or tadpole (ranunculus=diminutive frog or tadpole) and refers to its unusually wide head.
Jump to next section Species Information
Size 129mm or 5.1" SL. Find near, nearer or same sized spp.
IdentificationMature males and sometimes females have soft tentacles (bushy fleshy growths) on the snout - this is unique to the genus Ancistrus.

Although all black, this is an easily identified species of Ancistrus due to its extreme head-width.
SexingBoth sexes exhibit the Ancistrus trademark head-tentacles but they are much more prominent in sexually mature males.
Jump to next section Habitat Information
DistributionSouth America: Xingú and Tocantins River basins.
Amazon, Lower Amazon, Tocantins (click on these areas to find other species found there)
Amazon, Lower Amazon, Xingu (click on these areas to find other species found there)
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Temperature25.0-28.0°C or 77-82.4°F (Show species within this range)
Jump to next section Husbandry Information
FeedingAlthough still omnivorous, tends to be more of a carnivore than your average Ancistrus.
FurnitureNatural habitat is stony streams. Prefers to hide between cracks in the rock-base or under flat stones on the bottom.
CompatibilityA good complement to most aquariums, they are not aggressive to other species. Males may fight over territory if kept in too small a tank.
Suggested TankmatesAll community fish, small to medium sized cichlids.
BreedingTypical Ancistrus breeding behaviour. Males stay in caves and guard the brood. Females lay about 8 to 12 eggs. Eggs hatch after 5-7 days. After about 10 days the yolk sac is totally absorbed and the young start to eat. Fry are not problematic to raise. Once conditioned for spawning they spawn as often as common Ancistrus. Further information in breeding reports and Shane's World articles.
Jump to next section Further Information
ReferencesIchthyol. Explor. Freshwaters v. 5 (no. 4) - pp290 - Fig. 1
Registered Keepers(1) natefrog, (2) Trident2004, (3) husky_jim (k: 6), (4) phaedraeos (p: 2), (5) H, (6) DarkAtlas, (7) Devangel, (8) stinger, (9) Kenneth Wong, (10) Edris, (11) Brotox (p: 4), (12) Birger Amundsen, (13) Live, (14) Birger (k: 2), (15) Walter, (16) teknikAL, (17) zhallam, (18) nooneknows (k: 8), (19) Bahney, (20) misscoolkitty, (21) Pungen (k: 4), (22) FuglyDragon (k: 3), who also notes: "2 added 10/08/2009", (23) bcb, (24) kabaltah (k: 4), (25) Lakatu (p: 3), (26) fishkeeper, (27) krazyGeoff (k: 4), (28) EmilyA, (29) thlages, (30) andreogmikela (k: 19), (31) musilvr4eva, (32) Kenny Tay, (33) marangmic, (34) NC24, (35) Donald (k: 6), (36) rayfong, (37) plecomanpat (k: 4), (38) 2wheelsx2 (k: 2), who also notes: "Didn't make it past the first night.", (39) Dee (k: 2), (40) naboo, (41) jvision (k: 2), who also notes: "36"x12" tank w Hamburg filter and 2x 1000gph pumps. 84*F", (42) BernieEcht (p: 2, k: 5), (43) tagamasid1023 (p: 2, k: 2), who also notes: "Very shy.", "Seldom seen. Not your typical Ancistrus.", (44) 1walter9, (45) Travis Webb (k: 4), (46) Lars Jamne (k: 4), (47) agustingonzalez, (48) Pestey, (49) Catfishfingers, (50) AlphaWolf1995 (k: 9), (51) cjerrom, (52) pleco rob, (53) camtang, (54) junglejason, (55) Natey22, (56) Narwhal72, (57) NorthernGecko, (58) NCE12940 (k: 2), who also notes: "Wonderfully weird looking! Have acclimated well and eating like pigs.", (59) spip, (60) Barbie, (61) lutiy79, (62) DHarris, (63) Jborley, (64) CharlieM9, (65) fishyNZ (k: 2), (66) flatfish (k: 7), (67) DarrenG, (68) Koen (k: 2), (69) KeXx (k: 2), (70) protopterus, (71) dpfs, (72) Anna_krepak, (73) Barnsleypleco, (74) john h, (75) zopie.

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Breeding Reports(1) krazyGeoff (b: 55), (2) plecomanpat (b: 1).
Article - Shane's World Reproduction Breeding the Medusa Pleco, Ancistrus ranunculus
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Last Update2013 Jan 12 13:21 (species record created: 2001 Apr 25 00:00)