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
Faufré noir
Grammonus ater
A small Mediterranean cave brotula that slips out at night to hunt and tucks deep into crevices by day. It has an eel-like body with one long fin from back to tail and even gives birth to live young. Super cool if you are into cryptic species, but it is rarely seen in the trade.
Faustino's lanternfish
Diaphus faustinoi
Diaphus faustinoi is a marine lanternfish (family Myctophidae) reported from the Philippines and the western-central Pacific. Like other myctophids it is a deep/mesopelagic open-ocean fish with photophores and diel vertical migration behavior, and it is not a practical home-aquarium species.
Feathered river-garfish
Zenarchopterus dispar
Zenarchopterus dispar is a surface-hanging halfbeak from mangroves and sheltered bays, with that classic long lower jaw for snapping up insects and other floaty foods. Males get those funky elongated fin rays (the "feathered" look), and they are livebearers, so once they settle in you can occasionally get surprise babies. Biggest thing with this fish is giving it calm water up top, room to cruise, and a tight lid because halfbeaks can rocket-jump.
Fewpored gudgeon
Oxyeleotris paucipora
A tiny sleeper goby from New Guinea, this little gudgeon hangs out in weedy backwaters and leaf-littered creeks and does short dash-and-grab hunts for bite-size critters. Think of it as a shy, bottom-perching micro-predator that appreciates calm water, cover, and gentle tankmates.
Few-pored wriggler
Xenisthmus oligoporus
This is a teeny little Red Sea reef wriggler that lives down in sandy spots and stays pretty secretive. At barely around an inch long, its whole vibe is "blink and you miss it" - more of a cool oddball micro-predator than a display fish.
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Figure 8 Puffer (Eyespot puffer)
Dichotomyctere ocellatus (syn. Tetraodon biocellatus)
This is the small "Figure 8"/eyespot puffer with two bold eyespots and a yellow-green maze-like pattern. They're interactive and can be fin-nippy and territorial, especially toward other puffers. Husbandry advice on salinity varies by source: FishBase lists it as a freshwater species, while many aquarium references recommend low-end brackish (often around SG ~1.005-1.008) for long-term keeping, with very clean, stable water.
Fijian zebra dwarfgoby
Eviota pseudozebrina
This is a true micro-reef goby from Fiji that hangs tight to rockwork and algae-covered spots in super shallow water. It is one of those blink-and-you-miss-it fish, but once you start watching, you will see it perching, hopping, and picking at tiny foods all day. The big catch is keeping it well-fed and not letting bigger tankmates intimidate it or outcompete it at mealtime.
Fire-eyed loach
Barbucca diabolica
This is one of those tiny, oddball loaches that spends its whole day scooting along wood and rocks like a little vacuum cleaner, and those glowing red eyes are the whole vibe. It is peaceful and shy, but it gets way more confident in a dim, cover-filled tank with leaf litter and lots of little hideouts. Biggest thing people miss is feeding - it is a bottom grazer and pretty much will not chase food up in the water column.
Fire-eye goby
Yoga pyrops
This is a neat little Aussie goby that sticks close to soft, silty bottoms and shows off those pear-shaped blue eyes that gave it the name. Think of it as a shy perch-and-dart fish that appreciates calm tankmates and a sandy spot to chill. If you ever see one for sale, treat it like other small marine gobies with meaty micro-foods and stable reef-style water.
Firefish (Fire Goby / Fire Dartfish)
Nemateleotris magnifica
This is that little "hover-and-dart" reef fish with the yellow face and the white-to-red fade that looks like it was airbrushed on. It'll pick a bolt-hole in the rockwork, hang in the water column facing the current, and do that cute little flag-flick with the tall first dorsal fin when it's feeling bold.
Flabby sculpin
Zesticelus profundorum
This is a tiny deepwater sculpin from the North Pacific that lives way down on the bottom, not cruising around the reefs like typical “aquarium marines”. The wild habitat is cold, dark, and high-pressure (down to around 2580 m), so it is basically a “look up in a museum database” fish rather than something you can realistically keep at home.
Flabby whalefish
Gyrinomimus grahami
Gyrinomimus grahami is a deep-sea flabby whalefish from the Southern Ocean-ish parts of the world - big head, huge mouth, tiny eyes, and a super soft-bodied look. Its adult females are described as dark with reddish tones and orangey fins, and it lives crazy-deep in the bathypelagic zone, so its whole vibe is built around life in perpetual darkness.