Species Profiles
2742 articles- Humpback Limia Care GuideLimia nigrofasciata is a small livebearer endemic to Lake Miragoâne in Haiti; mature males develop a humped back. IUCN lists it as Criticall
- Rock Beauty Care GuideHolacanthus tricolor is a Western Atlantic marine angelfish with a sponge-dominated diet that makes it challenging to keep; IUCN Least Conce
- King Angel Care GuideHolacanthus passer is an Eastern Pacific marine angelfish ranging from the Gulf of California to Peru, listed as Least Concern by the IUCN.
- Clipperton Angel Care GuideHolacanthus limbaughi is a marine angelfish endemic to Clipperton Island in the Eastern Pacific, listed as Near Threatened by the IUCN.
- Clarion Angel Care GuideHolacanthus clarionensis is a marine angelfish largely restricted to Mexico's Revillagigedo Islands, listed as Vulnerable by the IUCN.
- Sampa Catfish Care GuideHeterobranchus longifilis is a very large African air-breathing catfish of the family Clariidae, reaching up to 150 cm, mainly important in
- Tamasopo Cichlid Care GuideHerichthys tamasopoensis is a Mexican cichlid endemic to the Tamasopo River, reaching about 18 cm and living in hard, clear, rocky waters.
- Cuatro Cienegas Cichlid Care GuideHerichthys minckleyi is an Endangered cichlid endemic to the Cuatro Cienegas basin in Mexico, notable for distinct tooth morphs adapted to p
- Curve-Bar Cichlid Care GuideHerichthys labridens is a Mexican cichlid of the Panuco basin, reaching up to 25 cm and listed as Endangered by the IUCN.
- Pearlscale Cichlid Care GuideHerichthys carpintis is a Mexican cichlid with pearl-blue scale spotting, native to the Panuco and Soto la Marina drainages, aggressive and
- Blood-Red Jewel Cichlid Care GuideHemichromis lifalili is a small red jewel cichlid from the Congo basin, reaching about 10 cm and becoming very aggressive when spawning.
- Banded Jewelfish Care GuideHemichromis fasciatus is a large predatory African jewel cichlid with five black side blotches, reaching over 25 cm and requiring a large, r
- Crystal-Eyed Catfish Care GuideHemibagrus wyckii is a large, highly aggressive Asian bagrid catfish from Southeast Asian rivers, suited only to very large or public aquari
- Radiant Wrasse Care GuideHalichoeres iridis is a small reef wrasse from the western Indian Ocean, reaching about 11.5 cm and living over sand and rubble on seaward r
- Checkerboard Wrasse Care GuideHalichoeres hortulanus is a large Indo-Pacific reef wrasse with a checkerboard pattern; a carnivore that eats hard-shelled invertebrates suc
- Argus Wrasse Care GuideHalichoeres argus is a small Indo-Pacific reef wrasse with an eye-spotted ('argus') pattern, a carnivorous, sand-diving species kept in mari
- Half-black Guppy Care GuideThe half-black guppy is a selectively bred strain of Poecilia reticulata with a solid black rear half; it is a peaceful, prolific livebearer
- Gymnogeophagus terrapurpura Care GuideGymnogeophagus terrapurpura is a recently described eartheater cichlid endemic to Uruguay, a substrate brooder of cool subtropical waters.
- Stripefin Eartheater Care GuideGymnogeophagus rhabdotus is a striped eartheater cichlid from Uruguay and Brazil that lays eggs on cleaned substrate and tolerates cool subt
- Thick-Lip Eartheater Care GuideGymnogeophagus labiatus is a Brazilian eartheater cichlid notable for its thick lips; it sifts sand and is a larvophile mouthbrooder toleran
- Naked-Cheek Eartheater Care GuideGymnogeophagus gymnogenys is a sand-sifting eartheater from Brazil and Uruguay that broods larvae in the mouth and tolerates cool subtropica
- Che Eartheater Care GuideGymnogeophagus che is an eartheater cichlid known only from a single Argentine stream, a sand-sifting species tolerant of cooler seasonal te
- Paraguay Eartheater Care GuideGymnogeophagus balzanii is a South American eartheater in which dominant males develop a large nuchal hump; it tolerates cool water and broo
- Green Tiger Barb Care GuideThe green tiger barb is a selectively bred colour form of Puntigrus tetrazona, an active, fin-nipping cyprinid that must be kept in larger g
- Green Discus Care GuideSymphysodon tarzoo is the green discus from the western Amazon, a red-spotted wild discus that practises exceptional biparental brood care.
- Golden Dwarf Barb Care GuidePethia gelius is a tiny golden barb from the Ganges and Brahmaputra drainages. A very peaceful, cool-tolerant nano fish for soft-water tanks
- Gold Tetra Care GuideHemigrammus rodwayi is the gold tetra, whose wild golden sheen results from a skin reaction to a parasite. A peaceful, hardy shoaling charac
- Gold Pristella Tetra Care GuideThe Gold Pristella is a selectively bred form of Pristella maxillaris, the X-ray tetra. A hardy, very peaceful shoaling characin from northe
- GloFish Black Skirt Tetra Care GuideThe GloFish Black Skirt Tetra is a fluorescent form of Gymnocorymbus ternetzi. Care matches the wild black skirt tetra: a peaceful South Ame
- GloFish Tiger Barb Care GuideThe GloFish Tiger Barb is a fluorescent selectively engineered form of Puntigrus tetrazona. Husbandry and behaviour match the wild tiger bar
- Ginrin Koi Care GuideGinrin koi are ornamental Cyprinus carpio carrying reflective metallic scales that can overlay any colour variety. Long-lived coldwater pond
- Winemiller's Eartheater Care GuideGeophagus winemilleri is a blackwater eartheater from the Rio Negro and Casiquiare system. A relatively peaceful sand-sifter for soft, acidi
- Redstripe Eartheater Care GuideGeophagus surinamensis is an eartheater cichlid endemic to Suriname and neighbouring rivers. A peaceful substrate sifter best kept in groups
- Red Hump Eartheater Care GuideGeophagus steindachneri is a Colombian eartheater cichlid whose dominant males develop a pronounced nuchal hump. A hardy maternal mouthbrood
- Common Eartheater (Geophagus proximus) Care GuideGeophagus proximus is a hardy Amazon eartheater often confused with G. surinamensis in the trade, best kept in groups.
- Parnaiba Eartheater (Geophagus parnaibae) Care GuideGeophagus parnaibae is an eartheater endemic to the Rio Parnaiba drainage of Brazil, found in sandy brooks and pools.
- Iporanga Eartheater (Geophagus iporangensis) Care GuideGeophagus iporangensis is a Brazilian eartheater from the Ribeira de Iguape basin, long confused with related coastal species.
- Dicrozoster Eartheater (Geophagus dicrozoster) Care GuideGeophagus dicrozoster is a peaceful Orinoco eartheater from acidic blackwater that is kept in groups.
- Thick-Lip Eartheater (Geophagus crassilabris) Care GuideGeophagus crassilabris is a Panamanian eartheater from flowing waters of central and eastern Panama.
- Pearl Eartheater (Geophagus brasiliensis) Care GuideGeophagus brasiliensis is a hardy, adaptable eartheater from coastal Brazil and Uruguay that tolerates a wide range of water.
- Silver-Spotted Eartheater (Geophagus argyrostictus) Care GuideGeophagus argyrostictus is a Rio Xingú eartheater that is more aggressive than most relatives and needs a group.
- Altifrons Eartheater (Geophagus altifrons) Care GuideGeophagus altifrons is a peaceful sand-sifting eartheater from the middle-to-lower Amazon, best kept in groups.
- Abalios Eartheater (Geophagus abalios) Care GuideGeophagus abalios is a peaceful Venezuelan eartheater from the Orinoco that sifts sand and is best kept in groups.
- Doctor Fish (Garra rufa) Care GuideGarra rufa is a hardy Middle Eastern cyprinid that grazes biofilm and is widely known from fish-spa pedicures.
- Featherfin Tetra Care GuideHemigrammus unilineatus is a peaceful silver tetra from northern South America with white-tipped fins and easy care.
- European Bitterling Care GuideRhodeus amarus is a small native European cyprinid that spawns inside living freshwater mussels and prefers cool tanks.
- Eurasian Minnow Care GuidePhoxinus phoxinus is a small cool-water shoaling minnow native across Eurasia, suited to unheated, well-oxygenated tanks.
- Red-stripe Barb (Pethia erythromycter) Care GuidePethia erythromycter is a small Burmese barb from the upper Ayeyarwady basin, suited to soft-water community tanks.
- Black Doradid Care GuideDoras carinatus is a South American talking catfish from the Guianas that produces audible sounds with its pectoral spines.
- Doitsu Koi Care GuideDoitsu koi are scaleless or partially scaled ornamental carp derived from German mirror carp, kept in outdoor ponds.