Search Species
Search for fish species by common or scientific name, or use filters to browse by water type, size, temperament, and difficulty.
Found 285 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.
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.
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.
Tippecanoe darter
Etheostoma tippecanoe
Teeny little riffle goblins that perch on the gravel and then rocket up to grab passing bugs. Males get a cool orange throat and fin edges in breeding season, and they spawn by burying eggs in clean pea-sized gravel. Awesome fish to watch, but they need cool, super-clean, fast-moving water to thrive.
Tom Coon's orestias
Orestias tomcooni
Orestias tomcooni is a little high-altitude killifish from the Lake Titicaca basin, built for chilly, oxygen-rich water. It is one of those super-niche Andean natives you almost never see in the trade, and the big "gotcha" is that it wants cool temps long-term, not a standard tropical setup.
Tombigbee darter
Etheostoma lachneri
This is a tiny Gulf Coastal Plain darter from the Tombigbee drainage, and the males get seriously wild in breeding colors - green/turquoise with orange and blue patterning. In the wild they hang around that stream transition zone from pools into riffles, sticking close to the bottom around sand-gravel, rubble, and snag cover. Think of it as a little bottom-perching insect-hunter that really wants clean, well-oxygenated flowing water.
Tonguetied minnow
Exoglossum laurae
Exoglossum laurae (tonguetied minnow) is a freshwater leuciscid minnow of cool, clean, rocky streams in parts of the eastern United States. It has a distinctive ventral mouth adapted for benthic feeding, and it is associated with pebble/rock nest spawning behavior documented for Exoglossum in scientific literature.
Tuivai stone loach
Mustura tuivaiensis
Mustura tuivaiensis is a tiny little brook/stone loach from the Tuivai River in Manipur, India - a bottom-hugging stream fish that spends its time nosing around the substrate. It is one of those "real" river loaches that really appreciates clean, oxygen-rich water and lots of cover (rocks, pebbles, leaf litter) so it can scoot from hideout to hideout.
Tumba tetra
Alestopetersius tumbensis
This is one of those lesser-seen Congo Basin African tetras, a small, silvery shoaler that really comes alive when you keep it in a proper group. It is from the Lake Tumba/Malebo Pool area, and like a lot of alestids it is an active midwater swimmer that appreciates space and clean, well-oxygenated water.