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Species

Browsing 1,092 species. Use the filters below to narrow down.

Marbled Goby

Marbled Goby

Fish

Pomatoschistus marmoratus

A cryptic little sand-dweller from Europe's coasts, full of quiet personality.

Marbled Hatchetfish

Marbled Hatchetfish

Fish

Carnegiella strigata

A deep-keeled surface dweller that brings life to the upper third of any tank.

Marbled Lyretail

Marbled Lyretail

Fish

Fundulopanchax marmoratus

A rare Cameroonian killifish with detailed marbled patterning and a preference for cool water.

Mario's cory

Mario's cory

Fish

Corydoras pinheiroi

A rare Amazonian cory that can breathe air and live for decades.

Masked Angelfish

Masked Angelfish

Fish

Genicanthus personatus

A rare Hawaiian endemic that's one of the most coveted angels in the hobby.

Maxima Clam

Maxima Clam

Invert

Tridacna maxima

A living jewel for the reef tank, with a lifespan that can outlast your mortgage.

Maya Tetra

Maya Tetra

Fish

Hyphessobrycon compressus

The founding species of its entire genus, rarely seen in the hobby.

Mccosker's Flasher

Mccosker's Flasher

Fish

Paracheilinus mccoskeri

A tiny reef wrasse where the males put on a color show like no other.

Mediterranean Fried Egg Jellyfish

Mediterranean Fried Egg Jellyfish

Invert

Cotylorhiza tuberculata

The Mediterranean jellyfish that looks exactly like a fried egg.

Medusa pleco

Medusa pleco

Fish

Ancistrus ranunculus

A flat-headed, rock-hugging pleco from Brazil's wild river rapids.

Mekong Croaking Gourami

Mekong Croaking Gourami

Fish

Trichopsis schalleri

The tiny gourami that actually produces sounds to resolve conflicts and court mates.

Mekong Giant Catfish

Mekong Giant Catfish

Fish

Pangasianodon gigas

One of the largest freshwater fish on Earth, and critically endangered.

Mekong Ricefish

Mekong Ricefish

Fish

Oryzias mekongensis

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

Melon Barb

Melon Barb

Fish

Haludaria fasciata

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

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.

Meteor Basslet

Meteor Basslet

Fish

Liopropoma susumi

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

Mexican Dwarf Crayfish

Mexican Dwarf Crayfish

Invert

Cambarellus patzcuarensis

Tiny, peaceful, and full of personality. The dwarf crayfish that plays well with others.

Mexican tetra

Mexican tetra

Fish

Astyanax mexicanus

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

Micro Cory

Micro Cory

Fish

Corydoras hastatus

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

Midget Chromis

Midget Chromis

Fish

Chromis acares

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

Millennium Cory

Millennium Cory

Fish

Corydoras spectabilis

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

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.

Molly

Molly

Fish

Poecilia sphenops

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

Money Cowrie

Money Cowrie

Invert

Cypraea moneta

A living relic once traded as currency across cultures worldwide.

Montezuma Swordtail

Montezuma Swordtail

Fish

Xiphophorus montezumae

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

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.

Moorish Idol

Moorish Idol

Fish

Zanclus canescens

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

Moth Catfish

Moth Catfish

Fish

Hara jerdoni

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

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.

Mullya Garra

Mullya Garra

Fish

Garra mullya

A hardy Indian stream fish with a sucker disc built for fast-moving water.