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 356 species
Leptostomias gladiator
This is a deep-sea barbeled dragonfish - long, jet-dark, and built like a little ambush predator with a huge toothy mouth. It lives way down in the bathypelagic zone and uses a chin barbel as a lure, so its whole vibe is "lights-out hunter" rather than anything you'd ever keep in an aquarium.
Kiunga ballochi
This is a tiny little PNG blue-eye with a mostly see-through body and subtle yellow-and-black fin markings that look really slick when a group is sparring and flashing. In the wild its range is extremely small (Upper Fly River system near Kiunga/Tabubil), so its basically a conservation fish as much as an aquarium fish. If you ever run into them, think calm, planted, clean-water setup and a decent-sized group so they feel secure.
Kryptopterus vitreolus
This is the truly transparent "glass" catfish from Thailand - you can literally see the spine and organs when its happy and settled in. The big trick is keeping them in a proper group and giving them calmer, dimmer conditions; once they feel secure, they cruise around together and look unreal in the water column.
Hemigrammus erythrozonus
The Glowlight Tetra (Hemigrammus erythrozonus) is a small, peaceful South American schooling tetra with a translucent silvery body and a distinctive iridescent orange-red stripe running from the snout to the base of the tail.
Trigonostigma hengeli
This is the little "orange neon line + tiny black wedge" rasbora that absolutely glows when you keep it over a dark substrate with plants and a bit of tannin-stained water. The best part is how tight they school-get a decent group and they move like one fish, super calming to watch.
Julidochromis ornatus
Julidochromis ornatus is that sleek little Tanganyikan rock-dweller with the gold body and crisp black stripes that just pops against a pile of limestone. Give it a tight maze of caves and it will pick one like its home base, patrol it, and (once paired up) it is a really fun cave spawner to watch. It is small, but it has big "this is my rock" energy - especially around breeding time.
Otocinclus affinis
Otocinclus affinis is a small South American suckermouth catfish prized for grazing soft algae and biofilm on plants, glass, and décor. It has a slender body with a dark lateral stripe and a pale underside, and it is best kept in groups where it feels secure. Although peaceful, it can be delicate when newly imported and does best in mature, well-oxygenated aquariums with plenty of natural growth to graze.
Nannostomus beckfordi
Beckford's pencilfish is that sleek little "stick with fins" that likes to hang in the upper half of the tank at a slight angle and flash a crisp dark stripe. Keep a proper group and you'll see males do these tiny sparring/display moments (no real damage) and the whole school just looks super classy over dark substrate and plants.
Carassius auratus
Goldfish are one of the most popular and recognizable freshwater fish in the aquarium hobby. They are known for their golden-orange coloration, although they can also appear in red, white, yellow, and black. Goldfish are highly adaptable and can thrive in a variety of conditions, making them a favorite among beginners.
Amblyeleotris wheeleri
Amblyeleotris wheeleri is that classic shrimp-goby that picks a sandy spot, makes a burrow, and basically turns your tank into a little nature documentary if you pair it with a pistol shrimp. It hangs at the burrow entrance, does the whole lookout routine, and flashes those red bands and blue speckling when it is settled in.
Kryptolebias gracilis
Kryptolebias gracilis is a very small Brazilian rivulid killifish from the Saquarema Lagoon basin (Rio de Janeiro State). It occurs in creeks and swamps in open vegetation, often in very shallow water (~5–10 cm), in both clear and tea-coloured water, and feeds mainly on small crustaceans (e.g., ostracods) and terrestrial arthropods.
Tetraodon nigroviridis
Green spotted puffers are little water puppies with fins-super curious, always watching you, and they'll beg like they've never been fed in their life. The bright green-and-black spotting stays eye-catching, and they've got that classic puffer "I'm plotting something" face. Just know they're not a true freshwater fish long-term, and they really do need crunchy foods to keep their teeth worn down.