Species
Browsing 643 species. Use the filters below to narrow down.
Mahecola Barb
FishPuntius mahecola
A rarely traded Kerala barb best appreciated in a lively, same-species school.
Mailed Cory
FishCorydoras amandajanea
A rare armored catfish from the Negro River that occasionally breathes air
Malawi Squeaker
FishSynodontis njassae
Lake Malawi's only squeaker, built for cichlid tanks and rocky hideouts.
Malaya Shrimp
InvertCaridina babaulti
A hardy, color-shifting dwarf shrimp that surprises you with every molt.
Mandarin Dragonet
FishSynchiropus splendidus
One of the most vividly colored fish on the reef, and one of the trickiest to keep.
Many Barred Distichodus
FishDistichodus fasciolatus
A boldly barred Congo giant that stays surprisingly peaceful for its size.
Marble Shrimp
InvertSaron marmoratus
A boldly patterned reef shrimp that hides by day and roams by night.
Mario's cory
FishCorydoras pinheiroi
A rare Amazonian cory that can breathe air and live for decades.
Masked Angelfish
FishGenicanthus personatus
A rare Hawaiian endemic that's one of the most coveted angels in the hobby.
Maxima Clam
InvertTridacna maxima
A living jewel for the reef tank, with a lifespan that can outlast your mortgage.
Maya Tetra
FishHyphessobrycon compressus
The founding species of its entire genus, rarely seen in the hobby.
Medusa pleco
FishAncistrus ranunculus
A flat-headed, rock-hugging pleco from Brazil's wild river rapids.
Melon Barb
FishHaludaria fasciata
An underrated Indian barb that rewards you with vivid male rivalry displays.
Menezesi Cory
FishAspidoras menezesi
A tiny Brazilian catfish with a surprisingly long lifespan and a Corydoras personality.
Merah Dwarf Barb
FishBoraras merah
Thumbnail-sized Borneo native that rewards patience with vivid schooling displays.
Merten's Butterflyfish
FishChaetodon mertensii
A reef-associated butterflyfish that pairs up and patrols the deeper reef edges.
Metallic Topminnow
FishGirardinus metallicus
A livebearer from Cuba with a glinting metallic sheen and real historical quirks.
Meta Tetra
FishHyphessobrycon metae
A tricky-to-identify Orinoco tetra that rewards patient, well-planned community tanks.
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 Cory
FishCorydoras hastatus
Tiny armored catfish that defies its family by cruising the midwater column.
Midget Chromis
FishChromis acares
A tiny schooling damsel that brings reef-like energy to modest-sized tanks.
Millennium Cory
FishCorydoras spectabilis
The 'millennium cory'. A peaceful schooler with spotted flair from Brazil's Guaporé basin.
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.
Montezuma Swordtail
FishXiphophorus montezumae
A wild swordtail with an absurdly long tail sword that rivals its own body length.
Moonlight Gourami
FishTrichogaster microlepis
A silver-scaled Southeast Asian gourami with a gentle nature and labyrinth breathing.
Moorish Idol
FishZanclus canescens
Iconic reef wanderer with a dramatic look that rarely thrives in captivity.
Mosaic Corydoras
FishCorydoras haraldschultzi
A long-lived armored catfish with detailed reticulated markings and a surprisingly social personality.
Moth Catfish
FishHara jerdoni
A moth-like micro catfish from Indian hill streams, best kept in groups.
Mottled Loach
FishAcanthocobitis botia
A peaceful, quirky bottom-dweller with a false eye that fools predators.
Mountain Barbel
FishAmphilius platychir
A sleek African stream catfish built for life in fast, rocky currents.
Multicolor Sea Star
InvertLinckia multifora
A reef sea star that comes in a kaleidoscope of mottled patterns, each one unique.
Naked Characin
FishGymnocharacinus bergi
A scaleless South American oddity from one of the world's most isolated streams.
Nassarius Snail
InvertNassarius vibex
A tireless sand-sifting scavenger that keeps reef substrate clean and aerated.
necklace nassa
InvertNassarius distortus
A tidy little scavenger from the Yaeyama Islands with a distinctively ornate shell.