Search Species
Search for fish species by common or scientific name, or use filters to browse by water type, size, temperament, and difficulty.
Found 275 species
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.
Flagfin cardinalfish
Jaydia truncata
Jaydia truncata is a nocturnal reef-associated cardinalfish found in inshore waters of the continental shelf in the Indo-Pacific. It reaches about 15 cm total length and in aquaria should be provided with calm tankmates and ample shelter/overhangs.
Flagtail
Kuhlia petiti
Silvery central-Pacific flagtail with a crisp black tail and bold white C-shaped marks on each lobe - it looks sharp cruising in the surf zone. It is a fast, schooling planktivore, so in captivity it wants strong flow and a lot of open water to swim.
Flame cardinalfish
Fowleria amblyuroptera
Fowleria amblyuroptera is a very small Indo-Pacific/Western Pacific cardinalfish (to about 4 cm SL) associated with coastal reefs/bays and is primarily nocturnal. Like many cardinalfishes, the male mouthbroods the eggs; in captivity it should be provided with ample shelter and offered appropriately sized meaty foods/planktonic items.
Frogmouth sculpin
Icelinus oculatus
Frogmouth sculpin is a little coldwater, bottom-hugging marine sculpin from the Pacific coast. It spends its time sitting on the substrate and blending in like a living rock, then darts short distances when food shows up. Super cool fish, but it is absolutely not a warm reef tank animal - it really wants chilly, oxygen-rich water and a calm setup.
Fulvopelvis shrimpgoby
Vanderhorstia fulvopelvis
This is a tiny little shrimpgoby from Okinawa (Japan) that lives down on sand and rubble and does the classic prawn-goby thing - hanging at a burrow entrance and relying on a snapping/pistol shrimp roommate for the digging. Its name literally points at a shiny yellow mark on the male's pelvic fin, and the fish itself is patterned with yellow spotting and a clean stripey/barred look.
Giant triangular batfish
Malthopsis gigas
A small, buckler‑armored deep‑sea batfish that “walks” on modified fins. Malthopsis gigas occurs on Indo‑West Pacific continental slopes (about 210–650 m) and reaches ~13.6 cm SL. Modeled preferred temperatures are ~8–17 °C. It is not suitable for typical home aquaria and would require specialized chilled marine systems; marine aquaria generally maintain seawater pH ~8.0–8.4.
Gilbert's cardinalfish
Zoramia gilberti
A tiny glassy cardinal that likes to hang in tight groups tucked under branching corals. The blue speckles on the head really pop under reef lights, and the males mouthbrood, so you might catch a dad holding eggs if the group settles in.