Search Species
Search for fish species by common or scientific name, or use filters to browse by water type, size, temperament, and difficulty.
Water Type
Search for fish species by common or scientific name, or use filters to browse by water type, size, temperament, and difficulty.
Found 371 species
Yunnanilus yangi
Yunnanilus yangi is a small freshwater stone loach (Nemacheilidae) described in 2024 from Yunnan, China (upper Pearl River/Nanpanjiang drainage). Species-specific aquarium guidance is limited in the literature; husbandry is typically inferred from related small Yunnanilus/Micronemacheilus-type loaches, emphasizing clean, well-oxygenated water, cover, and small foods.
Hyphessobrycon roseus
Hyphessobrycon roseus is a small phantom-type tetra (syn. Megalamphodus roseus) from the Maroni and Oyapock river basins (French Guiana/Guianas region). It is best kept in a planted, softwater setup in a group, where males may display but are generally peaceful.
Forsterygion flavonigrum
This is a tiny New Zealand triplefin that hangs around rocky reefs and overhangs, picking off little crustaceans. When males go into breeding colors they turn into a wild black-and-yellow flag, then they post up and guard the eggs like a grumpy little bouncer.
Zaireichthys flavomaculatus
Zaireichthys flavomaculatus is a truly tiny, bottom-hugging African loach catfish from the Congo basin that spends its time tucked into sand and gaps like a little river goblin. Its yellowish base color with blotchy/marbled spotting is the whole vibe, and it is the kind of fish you keep because you love oddball micro-predators and watching subtle behavior, not because it is always out front.
Pervagor alternans
This is a little reef filefish with that classic sandpapery skin and a super eye-catching yellow ring around the eye. It spends a lot of time poking around rock and coral, and when it gets spooked it kind of eases back into crevices instead of bolting. Not the most common aquarium fish, but really neat if you can get one that is eating well.
Noturus flavipinnis
Yellowfin madtoms are tiny, secretive native catfish from the upper Tennessee River system, and they act exactly like little river goblins - hiding under flat rocks all day and cruising around at night. The cool part is the male guards the eggs under cover, and they really appreciate clean, well-oxygenated current and a rock-and-leaf-litter kind of setup.
Opistognathus nothus
This is a deepwater Atlantic jawfish that lives in burrows on sand and rubble, and it has that classic jawfish vibe of popping up like a little periscope from its hole. The yellow edging inside the mouth is the giveaway, plus the spotty head and striped/yellow-edged fins. Because it comes from about 92-100 m depth, it is not something you should treat like a typical warm, shallow-reef jawfish in a home tank.
Hemimyzon yushanensis
This is a little Taiwan hillstream loach that lives its whole life clinging to rocks in fast, super-oxygenated streams. In a tank it does best in a "river" setup with smooth stones and lots of flow, where it will spend all day grazing biofilm and cruising the glass like a tiny underwater gecko.
Danio rerio
Zebra danios are those nonstop little stripey rockets that zip around the top and middle of the tank like they've had three espressos. They're super fun in a group because they chase, spar, and "race" each other without really meaning harm, and that constant motion makes the whole tank feel alive.
Hypancistrus zebra
This is the famous black-and-white striped L-number pleco (L046) from the Rio Xingu, and it really does look like a little underwater zebra. Its best traits are how cavey and secretive it is by day, then it pops out at night to hunt meaty foods - and the male will guard eggs in a cave if you ever breed them. It is not an algae-cleaner pleco, so think of it more like a tiny, warm-water, rock-dwelling catfish with attitude over caves.
Zebrias crossolepis
Zebrias crossolepis is a small marine sole with bold zebra-like bands, the kind of flatfish that spends its life glued to the bottom and trying to vanish into sand. It is a subtropical, demersal species from the northwest Pacific (reported from Guangdong, China) and tops out at around 14 cm standard length, so it stays pretty compact for a flatfish.