Search Species
Search for fish species by common or scientific name, or use filters to browse by water type, size, temperament, and difficulty.
Found 235 species
Indian Ocean lanternfish
Lampanyctus indicus
Lampanyctus indicus is a tiny deep-sea lanternfish from the equatorial Indian Ocean. Like other myctophids it has rows of light organs (photophores) and does the classic up-and-down daily migration in the water column. Super cool animal, but realistically its a research/deep-ocean species, not an aquarium fish.
Indian perch
Jaydia lineata
Jaydia lineata is a little Indo-West Pacific cardinalfish with a clean set of brown vertical bands and that classic big-eyed, hang-back cardinalfish vibe. The really cool part is the breeding - the male mouthbroods the eggs, so if you ever got a pair settled in, you could actually see some neat parental care behavior.
Indian sevenfinger threadfin
Filimanus similis
Filimanus similis is a small marine threadfin from the Indian Ocean with seven long, finger-like pectoral filaments it uses to feel around the bottom for food. Its color in life is usually brownish on top with a golden/silvery belly, and the fins often show darker edging, so it has that neat sandy-coast vibe. This is a demersal (bottom-associated) coastal species that shows up in trawl catches rather than the aquarium trade.
Izu dragonet
Callionymus izuensis
This is a little Japanese sand-dwelling dragonet from around the Izu Islands. Think of it as a bottom-hopper that hangs out on coarse sand and rubble and spends its time picking at tiny critters like most dragonets do. Super cool fish, but it is really more of a niche, species-tank kind of project than a casual community add.
Japanese deepwater clingfish
Aspasma minima
Aspasma minima is a tiny little marine clingfish from southern Japan that spends its life hugging hard surfaces with that cool suction-disc belly. Its whole vibe is secretive and bottom-oriented, more like a micro predator you design a tank around than a "community fish" you toss in with everything.
Japanese dory
Zenion japonicum
Zenion japonicum is a small deepwater dory from way down on the continental slope - silvery, big-eyed, and kind of "alien-cute" in that zeiform way. This is not an aquarium fish in any normal sense (it lives hundreds of meters deep in cold water), but it is a really neat bycatch species with that classic dory shape and spiny fins.
Japanese silver-biddy
Gerres equulus
Gerres equulus (Japanese silver-biddy) is a temperate, demersal coastal mojarra from the northwest Pacific (southern Korea to southern Japan), typically over sandy shallows; it is generally reported as absent from the Ryukyu Islands. It is primarily a coastal fish and is not commonly maintained in home aquaria; if kept, provide ample open swimming space and stable marine conditions.
Jonathan's cusk-eel
Neobythites jonathan
Neobythites jonathan is a deepwater cusk-eel from the western Pacific (Solomon Sea) that lives way down on the lower shelf/upper slope. It is a small, slender bottom-associated fish with a bold ocellus (eye-spot) on the dorsal fin - cool little bit of "fake eye" patterning you see in a bunch of Neobythites.
Kelp gunnel
Ulvicola sanctaerosae
This is a skinny little kelp-forest perch that literally hangs out up in the kelp canopy and chills on the fronds. One of the coolest bits is how it uses its tail to wrap onto kelp like a grip, then picks off tiny crustaceans drifting by. Not really an aquarium trade fish, but its a super neat West Coast oddball if you ever see one while diving.
Kerala sole
Zebrias keralensis
This is a small, sand-hugging marine sole from the Kerala coast area, with that classic zebra-style banding that helps it vanish the second it settles onto the bottom. Its whole deal is staying low, burying in fine sand, and picking off tiny bottom critters - super cool fish, but not really something you see in the aquarium trade.
Kermadec dwarfgoby
Eviota kermadecensis
This is a true micro-goby from the Kermadec Islands (Raoul Island area) - the kind of tiny reef fish that basically lives in the nooks and crannies and makes you stare at your rockwork more. Its whole vibe is cryptic and subtle, but that is exactly why dwarfgobies are so addicting once you start noticing them.
Kimura's sole
Aseraggodes kimurai
Aseraggodes kimurai is a tiny little marine sole (flatfish) from the western Pacific that spends its life glued to the bottom, blending into sand and rubble like a living leaf. Its whole vibe is stealth and camouflage, and it is the kind of fish you forget is even there until it scoots and re-buries itself. Super cool animal, but honestly not really an aquarium fish because it is a specialized bottom-dweller that wants live micro-food and a mature sandbed.