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
Longfin goatfish
Upeneus supravittatus
This is a small goatfish from the eastern Indian Ocean (Sri Lanka and southern India) that spends its time cruising near the bottom and rummaging through sand with its chin barbels. The cool part is watching it "hunt" - it will probe and sift like a little metal detector, then pounce on tiny buried critters. Not really a typical home-aquarium fish, but if you did keep one, you'd treat it like a sand-sifting predator that needs space and a mature, food-rich system.
Long-finned goby
Valenciennea longipinnis
This is that sand-sifting goby that pairs up, digs tidy little burrows, and keeps the substrate looking fresh while it snacks on tiny critters. Give it a mature sand bed and a tight lid, and it will reward you with tons of personality and those blue cheek markings showing off while it works.
Longfin sculpin
Jordania zonope
Jordania zonope is a super cool coldwater marine sculpin from the NE Pacific that clings to rocks and kelp and will even hang vertically on rock faces. Males get very territorial in breeding season, and some individuals are reported to act like little cleaner fish on bigger predators like lingcod - wild stuff for a fish this small.
Longhead grenadier
Coelorinchus longicephalus
This is a deep-sea rattail (grenadier) from the Northwest Pacific that lives way down on the slope, not something that can be kept in a normal aquarium. It gets a long, tapering body with that classic whiptail look, and it is built for cold, high-pressure water and cruising just off the bottom hunting small prey.
Longnose conger
Bathycongrus wallacei
This is a marine, deepwater (bathydemersal) conger eel reported from roughly 250-500 m depth in the Indo-West Pacific (including the southwestern Indian Ocean and Japan/Taiwan). It is a pale greyish eel shading paler below, with dorsal/anal fins that become increasingly blackish posteriorly and a black caudal fin; maximum reported total length is about 55 cm.
Longnose eagle ray
Myliobatis longirostris
This is a snouted eagle ray from the eastern Pacific (Gulf of California down to northern Peru) that cruises sandy coastal areas and digs out crunchy stuff like clams and crabs. Cool fish, but in real life its a big, roaming ray - not something that belongs in normal home aquariums unless youre talking a true public-aquarium-scale setup.
Longnose hawkfish
Oxycirrhites typus
This is that red-and-white, candy-cane striped hawkfish with the absurdly long snout that just sits up on rock or gorgonians like it owns the place. It is a perch-and-pounce micropredator, so it will nail small crustaceans (and anything shrimp-sized you were hoping to keep). Give it lots of ledges and hidey holes and you will basically get a tiny reef "watchdog" that posts up and stares at you all day.
Longray fangjaw
Zaphotias pedaliotus
This is a tiny deep-sea bristlemouth that lives way down in the midwater-dark and comes up and down the water column on a day-night cycle. Its little light organs (photophores) and even a slight nightly color shift are part of the whole "life in the deep" vibe - super cool, but absolutely not a home-aquarium fish.
Longsnout armored searobin
Paraheminodus longirostralis
This is a deepwater armored searobin - basically a little walking tank of a fish with bony plates and feeler-like rays it uses to hunt along the bottom. Its claim to fame is the extra-long snout projections, and it lives way down on the slope, not in the usual home-aquarium zone. Realistically, this is a research-trawl kind of species rather than something you keep at home.
Longsnout Pipefish
Vanacampus poecilolaemus
From southern Australia’s seagrass and macroalgal beds, this temperate pipefish threads through weedy shallows picking off tiny crustaceans with its straw-like snout. It does best in a chilled system with gentle-to-moderate flow and requires frequent small feedings of live or enriched meaty foods.
Longspine drum
Umbrina analis
Umbrina analis is an Eastern Pacific sciaenid (drum/croaker) that inhabits inshore soft bottoms (sand/mud) from the tip of Baja and the SW Gulf of California to Colombia, typically near the bottom in surf zones, bays, and shallow coastal waters (about 1–50 m). It is a carnivore feeding mainly on mobile benthic invertebrates (crustaceans, worms, and mollusks).
Longtail pencilsmelt
Nansenia longicauda
This one is a deepwater pencilsmelt that lives way down in the mesopelagic zone, so its more of a research-species than an aquarium fish. It tops out around 13 cm and seems to show up in patchy spots in the subtropical Atlantic and North Pacific, typically hundreds of meters down.