Search Species
Search for fish species by common or scientific name, or use filters to browse by water type, size, temperament, and difficulty.
Found 337 species
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.
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.
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.
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.
Torrent catfish
Glyptothorax chimtuipuiensis
A tiny hillstream cat that hugs rock faces with a grippy chest pad, G. chimtuipuiensis comes from fast, cool riffles in Mizoram. Set it up in strong flow with tons of oxygen and it will spend its time scooting from stone to stone like a little river ninja.
Torrent catfish
Glyptothorax interspinalum
Think of this as a little river cat that grips rocks with a ribbed chest pad so it can sit right in the rapids. It stays around 10 cm and comes from fast, cool streams in Laos, Vietnam, and southern China, so it shines in a high-flow, high-oxygen tank with smooth stones and meaty foods. ([fishbase.se](https://www.fishbase.se/summary/Glyptothorax-interspinalum))
Tufa darter
Etheostoma lugoi
Tiny darter from Mexico's Cuatro Cienegas springs that hugs the bottom over pale tufa rubble. Males get a neat blue throat in breeding dress and you will catch them scooting between the grooves of the stromatolites like little gobies. Gorgeous fish, but super specialized and protected in the wild.
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.
Tussy's small red fighter
Betta tussyae
Betta tussyae is a tiny little blackwater betta from peat swamp forests in Pahang, Malaysia, and it stays small enough that you can really do it justice in a compact, heavily planted tank. It likes soft, very acidic water and a calm setup with lots of leaf litter and cover, and it will absolutely use the labyrinth organ to gulp air like other bettas.
Twig catfish
Farlowella knerii
A true twig impersonator from the Ecuador-Peru headwaters, Farlowella knerii spends its days clinging to wood and plant stems while grazing on biofilm. Peaceful and shy, it looks like a stick with fins, and males will even guard neat rows of eggs on glass or driftwood if conditions are right.