Search Species
Search for fish species by common or scientific name, or use filters to browse by water type, size, temperament, and difficulty.
Found 541 species
Cascudo-viola
Loricariichthys anus
Large Loricariinae whiptail (Loricariichthys) from southern Brazil/Uruguay–lower Paraná basins; benthic detritus/iliophagous-omnivorous feeder. Males show an elongated lower lip during the reproductive season, and the genus includes facultative air-breathers; provide clean, well-oxygenated water and fine sand.
Caucasian scraper
Capoeta capoeta
Capoeta capoeta is a big, streamy scraper-barb from western Asia that spends a lot of its time cruising rivers and grazing on plant matter. Think of it like a coldwater-ish, current-loving algae grazer that gets way too large and active for most typical community tanks.
Celestial Pearl Danio
Danio margaritatus
This is the little "galaxy fish" everyone stops to stare at-dark bluish body sprinkled with pearly spots and those punchy orange/red fins. They're peaceful but kinda shy, and you'll see the best color and the cutest little male sparring displays when you keep a proper group in a heavily planted tank with gentle flow.
Chapala catfish
Ictalurus ochoterenai
This is a Mexico-native Ictalurus catfish from the Lerma River basin/Lake Chapala system. Think of it like a regional channel-catfish cousin - a bottom-hugging, food-motivated predator/omnivore that gets big enough that an aquarium becomes impractical fast unless you're basically running an indoor pond.
Chapala chub
Yuriria chapalae
A hardy-looking Mexican minnow from Lake Chapala, the Chapala chub spends its days cruising open water in loose groups and picking at small critters. It grows to about 4 inches and does best in cool to warm, hard, alkaline water like its home lake. It is a conservation-sensitive endemic, so it is more a species to admire and protect than one you will see for sale.
Chapultepec splitfin
Girardinichthys viviparus
This is a little goodeid livebearer from the Valley of Mexico where it comes from cool, oxygen-rich waters - think more like a temperate pond fish than a tropical livebearer. Males can get really sharp-looking with black edging (sometimes almost fully black) on the fins, and they do best when you keep them on the cool side with big, regular water changes.
Chekopa Mylochromis
Mylochromis chekopae
This is a Lake Malawi "hap" from the Mylochromis group that hangs out deeper over sand and works the bottom for tiny foods. In the wild its menu is basically little crustaceans plus some algae, so it does best long-term when you feed it like a grazing micro-predator instead of a pure carnivore.
Cherry barb
Rohanella titteya
Cherry barbs are small Sri Lankan barbs; males intensify to deep red (especially when breeding). They're generally peaceful and can be shy unless kept in a group, and they look best in planted aquariums with subdued lighting and darker substrate.
Chessboard cichlid
Dicrossus filamentosus
Dicrossus filamentosus is that classy little blackwater dwarf cichlid with the crisp "chessboard" pattern and, in mature males, a super cool lyretail with streamers. It's generally mellow and shy, but when a female is guarding eggs/fry she turns into a tiny, fearless bulldozer (and it's honestly awesome to watch). Give them soft, clean water, leaf litter, and calm tankmates and they really settle in and show their best colors.
Chestnut lamprey
Ichthyomyzon castaneus
A native North American lamprey that spends 5–7 years as a burrowed, filter‑feeding larva before metamorphosing into a parasitic adult that attaches to fishes and feeds on blood and bodily fluids; adults spawn in spring and die shortly after. It inhabits flowing rivers and some lakes with cool, well‑oxygenated water and is not suitable for community aquaria.
Chinese hillstream loach
Jinshaia sinensis
Jinshaia sinensis is one of those slick, fast-water loaches built for life clinging to rocks in strong current - big fins, low profile, and always looking for biofilm to pick at. It can do great in a purpose-built river tank with tons of oxygen and flow, but it is not the kind of loach that tolerates "average community tank" conditions for long.
Chinese large-mouth catfish
Silurus meridionalis
This is that giant river catfish from China with the vacuum-cleaner mouth. It snoozes under cover by day and then bolts out at feeding time, so if you ever keep one you are basically running an indoor pond with heavy-duty filtration. Wild-looking marbled pattern and tons of personality, but it will eat anything it can fit.