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
Talas stone loach
Triplophysa paradoxa
Triplophysa paradoxa is a little bottom-dwelling stone loach from the Talas River basin, built for life hugging the substrate in cooler, well-oxygenated water. In a tank it spends most of its time scooting around the bottom, wedging into crevices, and generally acting like a tiny river-goblin that wants lots of cover and clean water.
Tallapoosa darter
Etheostoma tallapoosae
This is a little Alabama-Georgia endemic darter that lives right where current starts to pick up - clean riffles and runs with gravel, cobble, and bigger rock. In a tank it acts like a tiny bottom-hugging stream perch, perching on stones and scooting between cover, and it really rewards you if you build a cool high-oxygen "river" setup.
Tanganyika deepwater claroteid catfish
Bathybagrus tetranema
Bathybagrus tetranema is a Lake Tanganyika catfish from the Zambian side, and it likes the deeper, dimmer water zones compared to most Tanganyika shoreline fish. It tops out around 6.7 inches standard length, so it is not a monster, but it is still a real catfish with that cool, chunky head-and-whiskers vibe.
Tanganyika electric catfish
Malapterurus tanganyikaensis
This is an electric catfish from Lake Tanganyika; FishBase describes it as a voracious piscivore that feeds on cichlids and is encountered in the littoral zone down to ~50 m (often bays/river mouths). As an electric catfish (Malapterurus), it can deliver powerful electric discharges—use extreme caution during maintenance and handling.
Tanganyika lampeye
Lacustricola pumilus
This is a tiny Lake Tanganyika-area lampeye killifish that hangs in little groups along quiet shorelines and river-mouth shallows. When the light hits right, the males flash a really slick metallic eye and warm orange tones in the fins, and they are constantly out in the open cruising the edges for food.
Taquari banjo catfish
Ernstichthys taquari
This is a tiny little banjo catfish from Brazil that lives right on the bottom and blends in with rocks, sand, and leaf litter. Its known habitat is shaded, vegetated stretches of a small whitewater river with moderate flow and lots of big rocks - very much a hide-and-sit-still kind of fish. In the aquarium hobby its basically a "research fish" right now: super cool, but there is almost no species-specific care data published.
Tequila splitfin
Zoogoneticus tequila
This is a little Mexican goodeid livebearer where the males get that awesome orange crescent in the tail and will spar and posture like tiny cichlids. They do best in a planted tank where they can duck into roots and stems, and once they're settled they'll breed steadily and you'll see lots of interesting social behavior.
Tetracamphilius pectinatus
Tetracamphilius pectinatus
A tiny African loach catfish with chocolate-and-cream banding, Tetracamphilius pectinatus tops out around an inch and hides in and around fine sand. It has a neat serrated pectoral spine without a locking mechanism, and behaves like other sand-loving catlets, so a soft sandy bed and gentle flow really brings it out. It is rare in the hobby, so think of it as a fun niche project rather than a first catfish.
Thac Ba spiny eel
Mastacembelus thacbaensis
A super-rare spiny eel from Thac Ba Lake in northern Vietnam, you almost never see this one in the hobby. There is very little published beyond its locality, so care is best treated like other Mastacembelus eels - sandy substrate, lots of hides, and meaty foods. If you stumble on one, plan for a big, secure tank because these guys are strong, secretive burrowers.
Thracian shemaya
Alburnus istanbulensis
Endemic to Turkey, occurring in coastal streams of Thrace (Marmara to SW Black Sea drainages) and Lake Sapanca; a small, silvery pelagic cyprinid (bleak/shemaya type).
Threadfin rainbowfish
Iriatherina werneri
This is the little rainbowfish with the ridiculous, delicate streamers - especially on the males, who love to posture and "dance" at each other in a calm planted tank. Keep them in a real group and they get way braver, cruising the top/midwater under floaters and showing off those thread-like fins. They are peaceful, but they really hate fast flow and rough tankmates that shred fins or outcompete them at feeding time.
Three-lined aphyosemion (three-lined killifish)
Aphyosemion trilineatus
Aphyosemion trilineatus is a small West African killifish from Cameroon that does best in a calm, plant-heavy setup with gentle filtration and a tight lid (they can jump). Males top out around 5.1 cm and look way flashier than females, and like most Aphyosemion they are happiest when you keep things on the soft, slightly acidic side and do changes slowly.