Search Species
Search for fish species by common or scientific name, or use filters to browse by water type, size, temperament, and difficulty.
Found 528 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.
Fedorov eelpout
Zoarces fedorovi
Zoarces fedorovi is a cold-water eelpout from the northern Sea of Okhotsk - an eel-shaped, bottom-hugging fish that hides under rocks and cruises around the bottom. Its claim to fame is being livebearing (viviparous), which is pretty wild for a marine fish, but its exact day-to-day habits in the wild are still not super well documented.
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.
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.
Finspot wrasse
Xenojulis margaritacea
This little wrasse is basically a nonstop grazer - it cruises the rockwork all day hunting tiny critters, then dives into the sand to sleep. Adults can get really flashy (especially males) with that signature black fin spot, and it is one of those fish that will absolutely remind you why lids matter because it can jump.
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.
Fish doctor
Gymnelus viridis
Gymnelus viridis (the fish doctor) is a cold-water Arctic eelpout with a long, scaleless, eel-like body that likes hugging the bottom in sand/mud and seaweed. It is a true marine fish from polar seas, feeding on crustaceans and other meaty bottom critters - basically a little benthic hunter built for chilly water.
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.
Flaccid catshark
Apristurus exsanguis
A ghostly deep-sea catshark from New Zealand, pale and kind of floppy-looking, that cruises 600-1200 m down where it is icy cold. It lays tough egg cases on the seafloor and grows to just under a meter. Super cool animal, but it is a deep, cold-water species that is totally unsuited to home aquariums.