Species Profiles
2402 articles- Rose Danio (Danio roseus) Care GuideDanio roseus is a small Mekong-basin danio with a rosy lower body that gleams purple-blue, a peaceful but fast-swimming dither fish.
- Tinwini Danio (Danio tinwini) Care GuideDanio tinwini is a small Burmese danio with rows of dark spots on a pale body, a peaceful schooler for community tanks.
- Moustached Danio (Danio dangila) Care GuideDanio dangila is among the largest Danio species, with long barbels and a reticulated pattern, needing a roomy tank for its active shoals.
- Orange-finned Danio (Danio kyathit) Care GuideDanio kyathit is a Burmese danio with orange fins, occurring in spotted and striped forms; a hardy, peaceful schooling fish.
- Glowlight Danio (Danio choprae) Care GuideDanio choprae is a small Burmese danio from Kachin State with gold and blue bands, kept as a peaceful schooling fish.
- Danionella cerebrum Care GuideDanionella cerebrum is a tiny translucent Myanmar cyprinid, one of the smallest vertebrates and a model organism in neuroscience.
- Danionella translucida Care GuideDanionella translucida is a near-transparent miniature cyprinid from Myanmar reaching about 1 cm, kept in large peaceful groups.
- Pearly Rasbora Care GuideRasboroides vaterifloris is an endangered rasbora endemic to southwestern Sri Lanka, a peaceful schooler for soft, slightly acidic aquariums
- Glowlight Rasbora Care GuideTrigonopoma pauciperforatum is a slim rasbora with a luminous red lateral stripe, a peaceful schooler from blackwater peat-swamp streams of
- Clown Rasbora Care GuideRasbora kalochroma is a larger reddish rasbora from Sundaland with two dark flank spots, a peaceful schooler needing soft, acidic blackwater
- Brilliant Rasbora Care GuideRasbora einthovenii is a slim Sundaland rasbora with a dark lateral line on a coppery body, a peaceful schooler from blackwater peat-swamp s
- Eyespot Rasbora Care GuideRasbora dorsiocellata is a compact Southeast Asian rasbora with a dark spot on the dorsal fin, a peaceful schooler for soft, acidic blackwat
- Sidestripe Rasbora Care GuideRasbora paviei is a slim, peaceful schooling rasbora from the Mekong, Chao Phraya and Mae Klong basins of Southeast Asia, tolerant of a wide
- Truncata Rasbora Care GuideTrigonostigma truncata is a harlequin rasbora described in 2020 from the east coast of the Malay Peninsula, distinguished by a truncated bla
- Red-hook Silver Dollar Care GuideMyloplus rubripinnis is a tall, peaceful schooling silver dollar from the Amazon and Orinoco with a bright red anal fin and a herbivorous di
- Silver Dollar (Metynnis) Care GuideMetynnis hypsauchen is a round, peaceful schooling characin from South America, a herbivorous relative of piranhas that readily eats aquariu
- Wimple Piranha Care GuideCatoprion mento is a small serrasalmid specialised as a scale-eater (lepidophage), with a distinctive underbite for stripping scales from ot
- Speckled Piranha Care GuideSerrasalmus spilopleura is a smaller South American piranha known for fin-biting behaviour and best kept as a solitary specimen.
- White Piranha Care GuideSerrasalmus rhombeus, the redeye piranha, is a solitary predator from the Amazon and Orinoco basins with one of the strongest bites among fi
- Piraya Piranha Care GuidePygocentrus piraya is the largest piranha species, endemic to the São Francisco River basin in Brazil and kept only in very large tanks.
- Black-spot Piranha (cariba) Care GuidePygocentrus cariba is a powerful Orinoco piranha with a black shoulder spot, a carnivorous schooling predator that requires a large tank and
- Worm-line Headstander Care GuideSynaptolaemus cingulatus is a rarely kept headstander from the upper Orinoco, Casiquiare and upper Xingu, swimming head-down and suited to s
- Frideric's Leporinus Care GuideLeporinus friderici is a large, widespread headstander with three dark blotches on a silvery body, feeding mainly on fruits, seeds and termi
- Banded Leporinus Care GuideLeporinus fasciatus is a large yellow-and-black banded headstander from the Amazon basin that becomes increasingly herbivorous and assertive
- Striped Headstander Care GuideAnostomus anostomus is a striped headstander from the Amazon and Orinoco basins that swims head-down and grazes on algae, plant matter and s
- Black-banded Copella Care GuideCopella nigrofasciata is a slender top-dwelling lebiasinid from northern South America, with a thin black lateral stripe; now treated as a s
- Nitidus Pencilfish Care GuideNannostomus nitidus is a small pencilfish from the Capim River basin of Pará, Brazil, with a thin dark lateral stripe and care typical of th
- Anduze's Pencilfish Care GuideNannostomus anduzei is among the smallest pencilfish, a roughly 16 mm nano characin from the upper Orinoco and Rio Negro tributaries.
- Two-striped Pencilfish Care GuideNannostomus bifasciatus is a slim pencilfish from the coastal rivers of Suriname and French Guiana, marked by two horizontal stripes.
- Ruby Red Pencilfish Care GuideNannostomus rubrocaudatus is a tiny Peruvian pencilfish with red-purple flanks and three black stripes, collected from the upper Marañón reg
- Harrison's Pencilfish Care GuideNannostomus harrisoni is a slim pencilfish endemic to the Demerara basin of Guyana, with reddish fins in males and a preference for soft, ac
- Tube-mouth Pencilfish Care GuideNannostomus unifasciatus is a slender oblique-swimming pencilfish with a single black lateral stripe, native to the upper Amazon and Orinoco
- Diptail Pencilfish Care GuideNannostomus eques is a small Amazonian pencilfish famous for its oblique, snout-up swimming posture and gentle, gregarious nature.
- Spotfin Hatchetfish Care GuideThoracocharax stellatus is the largest common freshwater hatchetfish, a wide-ranging South American surface insectivore marked by a dark spo
- Silver Hatchetfish Care GuideGasteropelecus levis is a freshwater hatchetfish from the lower Amazon basin, a surface-dwelling schooling species that needs a tightly cove
- Blackwing Hatchetfish Care GuideCarnegiella marthae is a tiny, surface-dwelling South American hatchetfish that needs a tightly fitting lid and a group of its own kind.
- Brichard's Congo Tetra Care GuideAlestopetersius brichardi is a small schooling African tetra from the Congo River basin, reaching about 8 cm.
- Yellow-tail Congo Tetra Care GuideAlestopetersius caudalis is a small African tetra from the Congo basin, kept as a peaceful, lively schooling fish.
- Distichodus affinis Care GuideDistichodus affinis is a silvery African characiform from the Congo basin, a plant-grazing fish best kept in groups.
- Long-nose Distichodus Care GuideDistichodus lusosso is a large, long-snouted herbivorous fish from the Congo River basin that grows too large and plant-destructive for most
- Six-banded Distichodus (Distichodus sexfasciatus) Care GuideDistichodus sexfasciatus is a large African characiform from the Congo basin and Lake Tanganyika, growing too big for most home tanks.
- Nurse Tetra (Brycinus nurse) Care GuideBrycinus nurse, the nurse tetra, is a large schooling African characin of widely distributed river systems, requiring a group and a spacious
- Longfin Tetra (Brycinus longipinnis) Care GuideBrycinus longipinnis is a robust, active African characin in which mature males develop an elongated dorsal fin.
- Blue Congo Tetra (Bathyaethiops greeni) Care GuideBathyaethiops greeni, the Green's moon tetra, is a peaceful schooling African characin from the middle Congo River basin.
- Rainbow Emperor Tetra (Nematobrycon lacortei) Care GuideNematobrycon lacortei is a small Colombian characid with rainbow iridescence and red eyes, closely related to the emperor tetra.
- Slender Tetra (Iguanodectes spilurus) Care GuideIguanodectes spilurus is an elongated South American tetra from Amazon and Orinoco tributaries, kept in soft-water groups.
- Hockey-stick Tetra (Thayeria obliqua) Care GuideThayeria obliqua is a peaceful Amazonian schooling tetra marked by a diagonal black stripe running into the lower caudal lobe.
- Royal Blue Tetra (Inpaichthys kerri) Care GuideInpaichthys kerri is a small iridescent purplish-blue characid from the Brazilian Aripuana basin, peaceful and best kept in groups.
- Silver Tetra Care GuideCtenobrycon spilurus is a tall silvery characin from the Orinoco basin and Guianas, an active schooling fish resembling a small silver dolla
- Astyanax fasciatus Care GuideAstyanax fasciatus is a hardy, silvery tetra ranging from Mexico to Argentina, tolerant of cooler temperatures than most characins.