Species
Browsing 1,092 species. Use the filters below to narrow down.
Marbled Goby
FishPomatoschistus marmoratus
A cryptic little sand-dweller from Europe's coasts, full of quiet personality.
Marbled Hatchetfish
FishCarnegiella strigata
A deep-keeled surface dweller that brings life to the upper third of any tank.
Marbled Lyretail
FishFundulopanchax marmoratus
A rare Cameroonian killifish with detailed marbled patterning and a preference for cool water.
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.
Mccosker's Flasher
FishParacheilinus mccoskeri
A tiny reef wrasse where the males put on a color show like no other.
Mediterranean Fried Egg Jellyfish
InvertCotylorhiza tuberculata
The Mediterranean jellyfish that looks exactly like a fried egg.
Medusa pleco
FishAncistrus ranunculus
A flat-headed, rock-hugging pleco from Brazil's wild river rapids.
Mekong Croaking Gourami
FishTrichopsis schalleri
The tiny gourami that actually produces sounds to resolve conflicts and court mates.
Mekong Giant Catfish
FishPangasianodon gigas
One of the largest freshwater fish on Earth, and critically endangered.
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.
Merah Dwarf Barb
FishBoraras merah
Thumbnail-sized Borneo native that rewards patience with vivid schooling displays.
Merry Widow
FishPhallichthys amates
A low-key Central American livebearer that thrives where flashier fish struggle.
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.
Meteor Basslet
FishLiopropoma susumi
A secretive reef cave-dweller with bold pinstripes and peaceful manners.
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.
Mini Chocolate Gourami
FishParasphaerichthys lineatus
A tiny Burmese labyrinth fish with some of the most unpredictable breeding behavior 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.
Montezuma Swordtail
FishXiphophorus montezumae
A wild swordtail with an absurdly long tail sword that rivals its own body length.
Moon Jellyfish
InvertAurelia aurita
striking open-water drifter that needs its own specialized kreisel tank.
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.
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.
Mound Coral
CoralPorites lutea
A slow-growing mound coral that builds reef foundations over decades.
Mountain Barbel
FishAmphilius platychir
A sleek African stream catfish built for life in fast, rocky currents.
Mullya Garra
FishGarra mullya
A hardy Indian stream fish with a sucker disc built for fast-moving water.