Search Species
Search for fish species by common or scientific name, or use filters to browse by water type, size, temperament, and difficulty.
Found 654 species
Darkspotted catfish
Aspidoras fuscoguttatus
Think of this one like a tiny Cory cousin with a busier little spot pattern and a ton of "shuffle and sift" energy on the bottom. It is happiest when you keep a proper little group and give it sand, plants, and some cover so it feels secure enough to cruise around in the open.
Darom's goatfish
Upeneus davidaromi
A deep-water Red Sea goatfish with a bold, banded tail and bright white chin barbels, it cruises the bottom and snuffles through sand for tiny critters. Super interesting behavior to watch, but it is a large, active marine fish from 150-500 m that is rarely (if ever) seen in the hobby and would need a very big, well-run system.
darter characin
Melanocharacidium rex
A chunky little bottom-hopper from the upper Amazon, this species perches on stones and makes short dashes to snatch drifting insects. It grows bigger than most of its relatives, so it really shines in a longer tank with good flow and a sandy, rock-strewn layout. Watching a group scoot and perch in the current is half the fun.
Datangzi Marsh Yunnan loach
Yunnanilus macrogaster
This is a little Chinese stone loach from a weedy marsh system in Yunnan, and it tops out around 7 cm (under 3 inches). Its name literally points at the chunky, swollen-belly look (macrogaster = large stomach), and it is an insect-and-worm picker that hangs along the bottom.
Decorated ponyfish
Nuchequula gerreoides
This is a little Indo-West Pacific ponyfish that hangs around coastal bottoms and wanders into estuaries, so it is a saltwater fish that can handle brackish too. In the wild it hunts tiny crustaceans when young and shifts into a more mixed, grab-what-you-can menu as it grows, which is very "estuary survivor" behavior. Cool little silvery fish, but its need for marine/brackish conditions (and the fact FishBase lists the family as basically not an aquarium fish) makes it a pretty niche, specialist keep.
Denison barb
Sahyadria denisonii
This is that sleek "torpedo" barb with the red racing stripe and black line-built for constant cruising in the middle of the tank. They're happiest in a proper group with lots of open swim room and really clean, oxygen-rich water with some flow. Get a school going and they look like a little pack of mini river missiles.
Densely scaled Yunnan loach
Yunnanilus polylepis
Yunnanilus polylepis is a tiny, newly-described stone loach from Yunnan, China that lives over plants in a deep pool, not a raging riffle. Males and females even look different (males show a dark side stripe), and the species name is literally about having lots of scales, which is a fun oddball trait for this group.
Diamond Barb (trade name; confirm ID carefully—name is inconsistently applied)
Hypsibarbus pierrei
This is one of those barbs that starts out looking fairly "normal" as a youngster, then turns into a big, fast river fish with a really cool diamond-sheen when it colors up. It does best in a big, well-oxygenated setup and really looks its best when you keep it in a proper group instead of a pair or solo.
Diamond Tetra
Moenkhausia pittieri
Diamond tetras are one of those fish that look kind of plain in the bag, then you get them settled in and they start throwing off this glittery, diamond-like shine when the light hits them-super satisfying to watch. They're active, always cruising around the midwater, and in a nice little school they'll do that tight, synchronized swimming thing that makes the tank feel alive.
Diamond Watchman Goby
Valenciennea puellaris
This is that sand-sifting goby you'll see cruising the bottom, taking huge mouthfuls of sand and spitting it out like a little construction crew. It's awesome for keeping a sandy substrate looking clean, but it'll also redecorate-so anything sitting on the sand is gonna get buried or undermined sooner or later. Super cool personality too, especially once it picks a favorite burrow and starts "working" all day.
Dianchi stone loach
Sphaerophysa dianchiensis
This is a tiny Chinese nemacheilid (stone loach) that lived on the bottom in Lake Dianchi, Yunnan. Sadly, its whole story in the hobby is basically that it is a super-local endemic that is listed as Critically Endangered and may even be gone from the wild, so it is not something you should expect to ever see for sale.
Disalvo's goby
Kelloggella disalvoi
Kelloggella disalvoi is a tiny little marine goby from Easter Island that tops out at just a couple centimeters, the kind of fish that can disappear in a rockscape if you blink. It is more of a cryptic, tidepool-style goby than a "show fish," so the fun is watching it perch, scoot, and hug the bottom like a little living punctuation mark.