Species
Browsing 486 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.
Mahachai Betta
FishBetta mahachaiensis
A nipa palm specialist from coastal Thailand with iridescent blue-green armor.
Mandor
FishBetta mandor
A small, secretive Bornean mouthbrooder best kept in quiet, species-focused setups.
Mantis Shrimp
InvertOdontodactylus havanensis
A Brazilian Atlantic crustacean that brings serious predator energy to the right tank.
Marbled Climbing Perch
FishCtenopoma weeksii
A cryptic Congo predator that vanishes into leaf litter before your eyes.
Marbled Goby
FishPomatoschistus marmoratus
A cryptic little sand-dweller from Europe's coasts, full of quiet personality.
Marbled Lungfish
FishProtopterus aethiopicus aethiopicus
An ancient African lungfish that breathes air and can outlast a drought.
Marbled Lyretail
FishFundulopanchax marmoratus
A rare Cameroonian killifish with detailed marbled patterning and a preference for cool water.
Marine Betta
FishCalloplesiops altivelis
A cave-dwelling mimic that fools predators by impersonating a moray eel.
Masked Puffer
FishArothron diadematus
A bold Red Sea puffer with a dramatic masked face and serious bite.
Meklong Spiny Eel
FishMacrognathus meklongensis
A secretive Thai spiny eel that comes out of hiding when hunger calls.
Mekong Croaking Gourami
FishTrichopsis schalleri
The tiny gourami that actually produces sounds to resolve conflicts and court mates.
Mekong Puffer
FishTetraodon suvattii
A bottom-hugging Mekong puffer that buries itself in river mud.
Mekong Tiger Perch
FishDatnioides undecimradiatus
A boldly barred Mekong predator with a long memory and a short temper.
Meteor Basslet
FishLiopropoma susumi
A secretive reef cave-dweller with bold pinstripes and peaceful manners.
Mexican Barnacle Blenny
FishAcanthemblemaria macrospilus
A pint-sized reef blenny that claims abandoned barnacle shells as its castle.
Milkspotted Puffer
FishChelonodon patoca
A schooling puffer from mangrove estuaries that gets surprisingly large.
Mirror Basslet
FishPseudanthias pleurotaenia
A rare, large anthias that demands respect, and space, in the reef tank.
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.
Moon Jellyfish
InvertAurelia aurita
striking open-water drifter that needs its own specialized kreisel tank.
Moore's Lamprologus
FishVariabilichromis moorii
A Lake Tanganyika rockdweller with a fascinating family life and devious brood tactics.
Mosquitofish
FishGambusia affinis
The notorious mosquitofish: tough, prolific, and not a friendly neighbor.
Mottled Bichir
FishPolypterus weeksii
A living fossil from the Congo with a swim bladder that doubles as a lung.
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.
Nantaiensis Goby
FishRhinogobius nantaiensis
A feisty Taiwanese stream goby that rewards patient, experienced keepers.
Narrow-bellied Seahorse
FishHippocampus angustus
A spiny Western Australian seahorse with a distinctively slender profile.
Narrow-lined Puffer
FishArothron manilensis
A bold, beak-toothed puffer that thrives from mangroves to lagoon reefs.
Neon Goby
FishElacatinus oceanops
A tiny cleaner fish that runs its own reef spa service.
Nile Bichir
FishPolypterus bichir
A living fossil that breathes air and moves like an eel.
Nilgiri Mystus
FishHemibagrus punctatus
A rare, spot-flanked Indian catfish built for serious catfish specialists only.
Nkhomo-benga Peacock
FishAulonocara baenschi
A peacock cichlid with a curved snout and brilliant gold coloration from Lake Malawi.
Ocellated Labyrinth Fish
FishCtenopoma muriei
A compact African labyrinth fish that punches above its weight in 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.