Search Species
Search for fish species by common or scientific name, or use filters to browse by water type, size, temperament, and difficulty.
Found 665 species
Gorgeous prawn-goby
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.
Goulding's lampeye
Fluviphylax gouldingi
This is one of those truly tiny Rio Negro blackwater lampeyes - like, adult size is basically the length of a grain of rice. In the right light you can catch a little orange blotch on the face, and males have a neat filament on the pelvic fin. They do best in a calm, heavily planted (or leaf-litter) setup where micro-food is always available.
Gracile rivulus (Kryptolebias)
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.
Gray Lipsucker
Andamia expansa
A small intertidal combtooth blenny from the Andaman Islands, it tops out around 3 inches and spends its time perching and grazing on microalgae. You will almost never see this one in shops, but if you ever do, think of it like a rock-hopping algae picker that really wants wave-splashed, mature rock to rasp on.
Green Spotted Puffer
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.
Green Swordtail
Xiphophorus hellerii
Swordtails are busy, always-on-the-move livebearers, and the males' "sword" tail extension is the whole show-lots of displaying and posturing in the open water. They're tough as nails in hard, slightly alkaline water, but in tight tanks the males will absolutely bicker and chase each other around.
Green Uruguay Dwarf Pleco
Hisonotus ringueleti
A tiny, green-tinged sucker cat from the Uruguay River, Hisonotus ringueleti stays truly bite-sized and spends its day grazing leaves and glass. Give it cool, clean, well-oxygenated water and a planted tank with plenty of biofilm and it will cruise around in a group like little leaf-hoppers.
Guenther's gudgeon
Acanthogobio guentheri
This is a Chinese river gudgeon from the upper Yellow River area, a bottom-hugging little cyprinid that spends a lot of time cruising the substrate. Its vibe is more "stream fish" than "tropical community" - give it good flow, lots of oxygen, and a sand-and-pebble setup and it really shines.
Gunther's baril
Opsarius radiolatus
Opsarius radiolatus is a fast, stream-type danio relative that really wants room to cruise - think clear, gravelly water and a lot of current. If you keep a small group in a long tank with good flow, they settle in and you get that constant, zippy midwater action that makes river tanks feel alive.
Guppy
Poecilia reticulata
The Guppy is one of the most popular freshwater fish among aquarium enthusiasts due to its colorful appearance and lively nature. These fish have a wide range of vibrant colors and tail shapes, making them a visual delight in any aquarium. Guppies are known for their peaceful temperament and ease of care, making them ideal for both beginner and experienced fishkeepers.
Hairy pipefish
Urocampus carinirostris
This is a tiny, stick-thin pipefish that lives in seagrass and algae beds and uses its prehensile tail to hang on like a little underwater chameleon. The coolest part is the "hairy" fringing (little filaments) all over the body that breaks up its outline, and like other syngnathids the male carries the eggs in a brood pouch under the tail.
Half-banded kuhli loach
Pangio semicincta
Pangio semicincta is one of those classic "striped kuhli" loaches that spends the day wedged in plants and caves, then comes out at lights-down to wiggle around like a tiny eel. They're super social once you keep a proper group, and they're famous for piling into the same hidey-hole together. Also: they're one of the species that gets mixed up/mislabeled in the trade a lot, so buying from a shop that IDs them carefully is a win.