Species
Browsing 396 species. Use the filters below to narrow down.
Longnose Tang
FishZebrasoma rostratum
A sleek, all-black Pacific tang with a distinctively elongated snout.
Lyon's Cichlid
FishAmphilophus lyonsi
A lesser-known Central American cichlid from Pacific-slope rivers worth seeking out.
Macculloch's Rainbowfish
FishMelanotaenia maccullochi
A compact, peaceful rainbowfish that rewards group keeping with vivid male displays.
Mad Barb
FishLeptobarbus hoevenii
A river giant with a wild reputation for eating intoxicating seeds
Maingano
FishMelanochromis cyaneorhabdos
An all-blue Malawi mbuna with serious attitude and a mouthbrooding twist.
Malawi Eyebiter
FishDimidiochromis compressiceps
The Lake Malawi ambush hunter famous for a truly unsettling feeding habit.
Malay glass catfish
FishOmpok eugeneiatus
A shy, schooling catfish from Southeast Asian peat swamps and flooded forests.
Marakely
FishParatilapia polleni
Madagascar's endangered black cichlid, bold in personality and beautiful in the biotope
Maroon Clownfish
FishAmphiprion tricinctus
Three bold white bars on deep orange. The Marshall Islands' own anemonefish.
Masked Julie
FishJulidochromis transcriptus
A bold little rock-dweller from Lake Tanganyika with sharp black-and-white contrast.
Masked Puffer
FishArothron diadematus
A bold Red Sea puffer with a dramatic masked face and serious bite.
Mbu Puffer
FishTetraodon mbu
A Congo giant that demands respect, space, and a very sturdy tank.
Mediterranean Fried Egg Jellyfish
InvertCotylorhiza tuberculata
The Mediterranean jellyfish that looks exactly like a fried egg.
Mekong Ricefish
FishOryzias mekongensis
A tiny Mekong native with vivid fin markings and surprisingly easy breeding habits.
Mexican Tetra
FishAstyanax fasciatus
A bold, wide-ranging tetra with a predatory streak that surprises many keepers.
Midas Blenny
FishEcsenius midas
A reef blenny that mimics anthias in color, movement, and social behavior.
Midas Cichlid
FishAmphilophus citrinellus
A bold, intelligent cichlid that recognizes its owner and demands respect in return.
Midget Chromis
FishChromis acares
A tiny schooling damsel that brings reef-like energy to modest-sized tanks.
Milkspotted Puffer
FishChelonodon patoca
A schooling puffer from mangrove estuaries that gets surprisingly large.
Mimic Surgeonfish
FishAcanthurus pyroferus
A juvenile master of disguise that grows into a bold reef grazer.
Montezuma Swordtail
FishXiphophorus montezumae
A wild swordtail with an absurdly long tail sword that rivals its own body length.
Moon Jellyfish
InvertAurelia aurita
striking open-water drifter that needs its own specialized kreisel tank.
Narrow-lined Puffer
FishArothron manilensis
A bold, beak-toothed puffer that thrives from mangroves to lagoon reefs.
Neon Dottyback
FishPseudochromis aldabraensis
A bold little reef dweller that punches well above its weight in personality.
Neon Goby
FishGobiosoma oceanops
A tiny reef cleaner that punches way above its weight.
Neon Goby
FishElacatinus oceanops
A tiny cleaner fish that runs its own reef spa service.
Niger Triggerfish
FishOdonus niger
Red teeth, blue body, and a personality that commands the whole tank.
Nilgiri Danio
FishDevario neilgherriensis
A rarely seen Indian hill stream danio with iridescent blue and yellow flanks.
Northern Rainbowfish
FishMelanotaenia affinis
One of the first rainbowfish in the hobby, now available in several wild forms.
Oaxaca Cichlid
FishVieja zonata
A rare Mexican cichlid with big personality and even bigger space requirements.
Oblique-lined Dottyback
FishCypho purpurascens
A bold little reef predator that punches well above its weight in attitude.
Ocellaris Clownfish
FishAmphiprion ocellaris
The iconic reef fish that lives fearlessly among stinging anemone tentacles.
Ocellated Snakehead
FishChanna pleurophthalma
Bold ocellus markings and predatory charisma from the peat swamps of Borneo.
Ocellated Wrasse
FishHalichoeres melasmapomus
A bold cheek-spotted wrasse with a wide Pacific range and big personality.
Okinawa Goby
FishGobiodon okinawae
Tiny, vivid, and inseparable from its Acropora home.
One-stripe Anthias
FishPseudanthias fasciatus
A deep-reef anthias famous for swimming upside-down along cave ceilings.