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Species

Browsing 2,303 species. Use the filters below to narrow down.

Mekong Puffer

Mekong Puffer

Fish

Tetraodon suvattii

A bottom-hugging Mekong puffer that buries itself in river mud.

Mekong Ricefish

Mekong Ricefish

Fish

Oryzias mekongensis

A tiny Mekong native with vivid fin markings and surprisingly easy breeding habits.

Mekong Tiger Perch

Mekong Tiger Perch

Fish

Datnioides undecimradiatus

A boldly barred Mekong predator with a long memory and a short temper.

Melon Barb

Melon Barb

Fish

Haludaria fasciata

An underrated Indian barb that rewards you with vivid male rivalry displays.

Mendezi Dwarf Cichlid

Mendezi Dwarf Cichlid

Fish

Apistogramma mendezi

A blackwater dwarf cichlid with a surprisingly gentle nature and fascinating cave-breeding habits.

Menezesi Cory

Menezesi Cory

Fish

Aspidoras menezesi

A tiny Brazilian catfish with a surprisingly long lifespan and a Corydoras personality.

Merah Dwarf Barb

Merah Dwarf Barb

Fish

Boraras merah

Thumbnail-sized Borneo native that rewards patience with vivid schooling displays.

Merry Widow

Merry Widow

Fish

Phallichthys amates

A low-key Central American livebearer that thrives where flashier fish struggle.

Merten's Butterflyfish

Merten's Butterflyfish

Fish

Chaetodon mertensii

A reef-associated butterflyfish that pairs up and patrols the deeper reef edges.

Metallic Topminnow

Metallic Topminnow

Fish

Girardinus metallicus

A livebearer from Cuba with a glinting metallic sheen and real historical quirks.

Meta Tetra

Meta Tetra

Fish

Hyphessobrycon metae

A tricky-to-identify Orinoco tetra that rewards patient, well-planned community tanks.

Meteor Basslet

Meteor Basslet

Fish

Liopropoma susumi

A secretive reef cave-dweller with bold pinstripes and peaceful manners.

Mexican Barnacle Blenny

Mexican Barnacle Blenny

Fish

Acanthemblemaria macrospilus

A pint-sized reef blenny that claims abandoned barnacle shells as its castle.

Mexican Jawfish

Mexican Jawfish

Fish

Opistognathus mexicanus

A burrowing Mexican charmer that watches the world from its self-made home.

Mexican tetra

Mexican tetra

Fish

Astyanax mexicanus

The cave fish that lost its eyes and gained extraordinary senses.

Mexican Tetra

Mexican Tetra

Fish

Astyanax fasciatus

A bold, wide-ranging tetra with a predatory streak that surprises many keepers.

Micro Cory

Micro Cory

Fish

Corydoras hastatus

Tiny armored catfish that defies its family by cruising the midwater column.

Micro Glassfish

Micro Glassfish

Fish

Danionella translucida

One of the tiniest freshwater fish alive, and surprisingly easy to breed.

Midas Blenny

Midas Blenny

Fish

Ecsenius midas

A reef blenny that mimics anthias in color, movement, and social behavior.

Midas Cichlid

Midas Cichlid

Fish

Amphilophus citrinellus

A bold, intelligent cichlid that recognizes its owner and demands respect in return.

Midget Chromis

Midget Chromis

Fish

Chromis acares

A tiny schooling damsel that brings reef-like energy to modest-sized tanks.

Milkspotted Puffer

Milkspotted Puffer

Fish

Chelonodon patoca

A schooling puffer from mangrove estuaries that gets surprisingly large.

Millennium Cory

Millennium Cory

Fish

Corydoras spectabilis

The 'millennium cory'. A peaceful schooler with spotted flair from Brazil's Guaporé basin.

Mimic Surgeonfish

Mimic Surgeonfish

Fish

Acanthurus pyroferus

A juvenile master of disguise that grows into a bold reef grazer.

Mini Chocolate Gourami

Mini Chocolate Gourami

Fish

Parasphaerichthys lineatus

A tiny Burmese labyrinth fish with some of the most unpredictable breeding behavior in the hobby.

Mini-piranha

Mini-piranha

Fish

Serrasalmus sanchezi

A misidentified mini-piranha relative with razor teeth and a fiery red throat.

Minkley's Cichlid

Minkley's Cichlid

Fish

Herichthys minckleyi

A rare Mexican cichlid from one of the world's most extraordinary desert springs.

Minor Tetra

Minor Tetra

Fish

Hyphessobrycon minor

A peaceful little tetra from Guyana that's seldom seen in the hobby.

Mirror Basslet

Mirror Basslet

Fish

Pseudanthias pleurotaenia

A rare, large anthias that demands respect, and space, in the reef tank.

Mokele-mbembe Bichir

Mokele-mbembe Bichir

Fish

Polypterus mokelembembe

An ancient, armored predator from the Congo's murky depths.

Molly

Molly

Fish

Poecilia sphenops

A livebearer classic that can thrive from freshwater all the way to full marine conditions.

Molly Miller

Molly Miller

Fish

Scartella cristata

A tidepool blenny with a wild mohawk and an appetite for algae.

Monkey Bay Cichlid

Monkey Bay Cichlid

Fish

Alticorpus mentale

A deep-water Malawi cichlid from sandy depths rarely seen in the hobby.

Montecristo Cichlid

Montecristo Cichlid

Fish

Vieja heterospila

A robust Central American cichlid from some of Mexico's most storied river systems.

Montezuma Swordtail

Montezuma Swordtail

Fish

Xiphophorus montezumae

A wild swordtail with an absurdly long tail sword that rivals its own body length.

Moonlight Gourami

Moonlight Gourami

Fish

Trichogaster microlepis

A silver-scaled Southeast Asian gourami with a gentle nature and labyrinth breathing.