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Species

Browsing 3,374 species. Use the filters below to narrow down.

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.

Monasteria Microporous Coral

Monasteria Microporous Coral

Coral

Montipora monasteriata

A tiered plating coral with subtle blue margins and a demanding personality.

Money Cowrie

Money Cowrie

Invert

Cypraea moneta

A living relic once traded as currency across cultures worldwide.

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.

Montipora Cap

Montipora Cap

Coral

Montipora capricornis

A plating coral that builds dramatic layered shelves in purple, blue, or brown.

Moon Coral

Moon Coral

Coral

Astreopora longisepta

A rare Kenyan plating coral that rewards only the most dedicated reefers.

Moon Jellyfish

Moon Jellyfish

Invert

Aurelia aurita

striking open-water drifter that needs its own specialized kreisel tank.

Moonlight Gourami

Moonlight Gourami

Fish

Trichogaster microlepis

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

Moonspot Licorice Gourami

Moonspot Licorice Gourami

Fish

Parosphromenus linkei

A pint-sized blackwater gourami with head-down courtship displays unlike any other.

Moore's Lamprologus

Moore's Lamprologus

Fish

Variabilichromis moorii

A Lake Tanganyika rockdweller with a fascinating family life and devious brood tactics.

Moorish Idol

Moorish Idol

Fish

Zanclus canescens

Iconic reef wanderer with a dramatic look that rarely thrives in captivity.

Mosaic Corydoras

Mosaic Corydoras

Fish

Corydoras haraldschultzi

A long-lived armored catfish with detailed reticulated markings and a surprisingly social personality.

Mosquito Fern / Fairy Moss (Azolla caroliniana)

Mosquito Fern / Fairy Moss (Azolla caroliniana)

Plant

Azolla caroliniana

A fast-spreading floating fern that doubles as a nursery roof for shrimp and fry.

Mosquitofish

Mosquitofish

Fish

Gambusia affinis

The notorious mosquitofish: tough, prolific, and not a friendly neighbor.

Moth Catfish

Moth Catfish

Fish

Hara jerdoni

A moth-like micro catfish from Indian hill streams, best kept in groups.

Mottled Bichir

Mottled Bichir

Fish

Polypterus weeksii

A living fossil from the Congo with a swim bladder that doubles as a lung.

Mottled Catfish

Mottled Catfish

Fish

Amarginops ornatus

A sleek Congo predator with ornate markings and serious attitude toward tankmates.

Mottled Loach

Mottled Loach

Fish

Acanthocobitis botia

A peaceful, quirky bottom-dweller with a false eye that fools predators.

Mound Coral

Mound Coral

Coral

Porites lutea

A slow-growing mound coral that builds reef foundations over decades.

Mountain Barbel

Mountain Barbel

Fish

Amphilius platychir

A sleek African stream catfish built for life in fast, rocky currents.

Mountainous Star Coral

Mountainous Star Coral

Coral

Orbicella annularis

A reef-building powerhouse that forms the backbone of Caribbean coral ecosystems.

Moustache Catfish

Moustache Catfish

Fish

Auchenipterus nuchalis

A surface-roaming catfish with bizarre ossified barbels and secretive nocturnal habits.

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Moustache Jawfish

Fish

Opistognathus lonchurus

A bold little burrower with a face full of personality.