Species
Browsing 459 species. Use the filters below to narrow down.
Macmaster's Dwarf Cichlid
FishApistogramma macmasteri
A compact Colombian cichlid with big personality and fascinating cave-breeding behavior.
Magenta Dottyback
FishPictichromis porphyrea
A bold little reef fish that punches well above its weight in personality.
Mahachai Betta
FishBetta mahachaiensis
A nipa palm specialist from coastal Thailand with iridescent blue-green armor.
Maingano
FishMelanochromis cyaneorhabdos
An all-blue Malawi mbuna with serious attitude and a mouthbrooding twist.
Malabar Baril
FishBarilius gatensis
A bold, fast-moving hill stream fish that needs equally assertive tankmates.
Marbled Climbing Perch
FishCtenopoma weeksii
A cryptic Congo predator that vanishes into leaf litter before your eyes.
Marbled Crayfish
InvertCherax peknyi
A bold Australian freshwater crayfish with personality to spare.
Maroon Clownfish
FishAmphiprion tricinctus
Three bold white bars on deep orange. The Marshall Islands' own anemonefish.
Maroon Clownfish
FishPremnas biaculeatus
The boldest clownfish in the hobby, and it knows it.
Mekong Puffer
FishTetraodon suvattii
A bottom-hugging Mekong puffer that buries itself in river mud.
Mexican Barnacle Blenny
FishAcanthemblemaria macrospilus
A pint-sized reef blenny that claims abandoned barnacle shells as its castle.
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.
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.
Minkley's Cichlid
FishHerichthys minckleyi
A rare Mexican cichlid from one of the world's most extraordinary desert springs.
Mokele-mbembe Bichir
FishPolypterus mokelembembe
An ancient, armored predator from the Congo's murky depths.
Monkey Bay Cichlid
FishAlticorpus mentale
A deep-water Malawi cichlid from sandy depths rarely seen in the hobby.
Montecristo Cichlid
FishVieja heterospila
A robust Central American cichlid from some of Mexico's most storied river systems.
Moustache Catfish
FishAuchenipterus nuchalis
A surface-roaming catfish with bizarre ossified barbels and secretive nocturnal habits.
Moustache Jawfish
FishOpistognathus lonchurus
A bold little burrower with a face full of personality.
Multibar Angelfish
FishCentropyge multifasciata
A deep-dwelling pygmy angel that rarely makes it into the hobby.
Multicolor angelfish
FishCentropyge multicolor
A deep-reef dweller with bold coloring that rarely makes it to store shelves.
Multifasciatus
FishNeolamprologus multifasciatus
Possibly the world's smallest cichlid, big attitude packed into a tiny shell.
Mystery Wrasse
FishPseudocheilinus ocellatus
A secretive reef wrasse with bold colors and a talent for disappearing.
Mystic Mystus
FishMystus mysticetus
A gregarious Southeast Asian catfish with a uniquely lateral-eyed look.
Niger Triggerfish
FishOdonus niger
Red teeth, blue body, and a personality that commands the whole tank.
Night Aulonocara
FishAulonocara hueseri
A sand-sifting peacock cichlid with deep blue coloration from Lake Malawi's rocky shores.
Nile Bichir
FishPolypterus bichir
A living fossil that breathes air and moves like an eel.
Nkhomo-benga Peacock
FishAulonocara baenschi
A peacock cichlid with a curved snout and brilliant gold coloration from Lake Malawi.
Oaxaca Cichlid
FishVieja zonata
A rare Mexican cichlid with big personality and even bigger space requirements.
Obliquidens Hap
FishHaplochromis obliquidens
A scrappy Victorian cichlid with a taste for algae and a bold personality.
Ocellated Puffer
FishTakifugu ocellatus
A surprisingly peaceful puffer with a wild lifecycle from river to reef.
Ocellated pufferfish
FishLeiodon cutcutia
A pufferfsh from Asian rivers and canals with a surprisingly long lifespan.
Ocellated Wrasse
FishHalichoeres melasmapomus
A bold cheek-spotted wrasse with a wide Pacific range and big personality.
Octopus Coral
CoralGalaxea astreata
A sprawling, tentacled coral with surprisingly sharp defensive reach.