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Species

Browsing 1,911 species. Use the filters below to narrow down.

Maroon Clownfish

Maroon Clownfish

Fish

Premnas biaculeatus

The boldest clownfish in the hobby, and it knows it.

Masked Angelfish

Masked Angelfish

Fish

Genicanthus personatus

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

Masked Julie

Masked Julie

Fish

Julidochromis transcriptus

A bold little rock-dweller from Lake Tanganyika with sharp black-and-white contrast.

Masked Puffer

Masked Puffer

Fish

Arothron diadematus

A bold Red Sea puffer with a dramatic masked face and serious bite.

Masken Apisto

Masken Apisto

Fish

Apistogramma paulmuelleri

A tiny Peruvian dwarf cichlid with outsized color and surprisingly bold personality.

Maulbrüter Apisto

Maulbrüter Apisto

Fish

Apistogramma barlowi

The only Apistogramma that mouthbroods. Or doesn't, depending on its mood.

Mayan Cichlid

Mayan Cichlid

Fish

Cichlasoma urophthalmus

A brackish-tolerant bruiser that can handle conditions few other cichlids can.

Maya Tetra

Maya Tetra

Fish

Hyphessobrycon compressus

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

Mbu Puffer

Mbu Puffer

Fish

Tetraodon mbu

A Congo giant that demands respect, space, and a very sturdy tank.

Mccosker's Flasher

Mccosker's Flasher

Fish

Paracheilinus mccoskeri

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

Mcculloch's Anemonefish

Mcculloch's Anemonefish

Fish

Amphiprion mccullochi

A rare island endemic with a bold personality that punches well above its size.

Media Luna Pupfish

Media Luna Pupfish

Fish

Cualac tessellatus

A rare Mexican pupfish with a conservation story worth getting behind.

Mediterranean Killifish

Mediterranean Killifish

Fish

Aphanius fasciatus

A rare Mediterranean killifish that rewards dedicated keepers with fascinating, constant activity.

Medusa pleco

Medusa pleco

Fish

Ancistrus ranunculus

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

Mekong Bumblebee Goby

Mekong Bumblebee Goby

Fish

Brachygobius mekongensis

A pint-sized brackish goby with bold banded markings and a big personality.

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.

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.

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 Barnacle Blenny

Mexican Barnacle Blenny

Fish

Acanthemblemaria macrospilus

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

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.

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.