Species
Browsing 588 species. Use the filters below to narrow down.
Mailfish
FishCleidopus gloriamaris
A living lantern: the fish that carries its own lights on its jaw.
Malabar Hatchet Chela
FishLaubuka fasciata
A peaceful Indian hill stream schooler that rewards keepers who buy in groups.
Malayan Loach
FishPangio semicincta
The fish sold as kuhli loach is almost certainly this one instead.
Malaya Shrimp
InvertCaridina babaulti
A hardy, color-shifting dwarf shrimp that surprises you with every molt.
Malay glass catfish
FishOmpok eugeneiatus
A shy, schooling catfish from Southeast Asian peat swamps and flooded forests.
Malaysian Trumpet Snail
InvertMelanoides tuberculata
The tireless substrate burrower that aerates your gravel while you sleep.
Many-spined Cowfish
FishLactoria diaphana
A boxy, horned oddity that roams reefs and mudflats across the entire Indo-Pacific.
Marbled Hatchetfish
FishCarnegiella strigata
A deep-keeled surface dweller that brings life to the upper third of any tank.
Marble Shrimp
InvertSaron marmoratus
A boldly patterned reef shrimp that hides by day and roams by night.
Marine Nerite Snail
InvertVittina coromandeliana
A tough little grazer that keeps reef glass spotlessly clean.
Maxima Clam
InvertTridacna maxima
A living jewel for the reef tank, with a lifespan that can outlast your mortgage.
Mccosker's Flasher
FishParacheilinus mccoskeri
A tiny reef wrasse where the males put on a color show like no other.
Mekong Ricefish
FishOryzias mekongensis
A tiny Mekong native with vivid fin markings and surprisingly easy breeding habits.
Melon Barb
FishHaludaria fasciata
An underrated Indian barb that rewards you with vivid male rivalry displays.
Mendezi Dwarf Cichlid
FishApistogramma mendezi
A blackwater dwarf cichlid with a surprisingly gentle nature and fascinating cave-breeding habits.
Merry Widow
FishPhallichthys amates
A low-key Central American livebearer that thrives where flashier fish struggle.
Metallic Topminnow
FishGirardinus metallicus
A livebearer from Cuba with a glinting metallic sheen and real historical quirks.
Mexican Dwarf Crayfish
InvertCambarellus patzcuarensis
Tiny, peaceful, and full of personality. The dwarf crayfish that plays well with others.
Mexican tetra
FishAstyanax mexicanus
The cave fish that lost its eyes and gained extraordinary senses.
Micro Glassfish
FishDanionella translucida
One of the tiniest freshwater fish alive, and surprisingly easy to breed.
Midget Chromis
FishChromis acares
A tiny schooling damsel that brings reef-like energy to modest-sized tanks.
Mini Chocolate Gourami
FishParasphaerichthys lineatus
A tiny Burmese labyrinth fish with some of the most unpredictable breeding behavior in the hobby.
Minor Tetra
FishHyphessobrycon minor
A peaceful little tetra from Guyana that's seldom seen in the hobby.
Molly
FishPoecilia sphenops
A livebearer classic that can thrive from freshwater all the way to full marine conditions.
Money Cowrie
InvertCypraea moneta
A living relic once traded as currency across cultures worldwide.
Moorish Idol
FishZanclus canescens
Iconic reef wanderer with a dramatic look that rarely thrives in captivity.
Moth Catfish
FishHara jerdoni
A moth-like micro catfish from Indian hill streams, best kept in groups.
Mullya Garra
FishGarra mullya
A hardy Indian stream fish with a sucker disc built for fast-moving water.
Multicolor Sea Star
InvertLinckia multifora
A reef sea star that comes in a kaleidoscope of mottled patterns, each one unique.
Mushroom Coral
CoralPleuractis moluccensis
A laid-back free-living coral that sits on the sand and asks for very little.
Myanmar Redfin 2
FishOreichthys sp. "Myanmar Redfin 2"
A tiny, feisty shoaler from Myanmar with a bold caudal blotch and plenty of personality.
Mystery Snail
InvertPomacea bridgesii
A peaceful, algae-grazing snail that comes in a rainbow of shell colors.
Nana Rasbora
FishMicrodevario nanus
Tiny Myanmar schooler with a bold dorsal-fin blotch and big personality in small packages.
Nassarius Snail
InvertNassarius vibex
A tireless sand-sifting scavenger that keeps reef substrate clean and aerated.
Nemacheilus petrubanarescui
FishMesonoemacheilus petrubanarescui
A shy Indian stream loach best kept in groups to bring it out of hiding.
Neon Goby
FishGobiosoma oceanops
A tiny reef cleaner that punches way above its weight.