Species
Browsing 2,796 species. Use the filters below to narrow down.
Millennium Cory
FishCorydoras spectabilis
The 'millennium cory'. A peaceful schooler with spotted flair from Brazil's Guaporé basin.
Mimic Surgeonfish
FishAcanthurus pyroferus
A juvenile master of disguise that grows into a bold reef grazer.
Mini Chocolate Gourami
FishParasphaerichthys lineatus
A tiny Burmese labyrinth fish with some of the most unpredictable breeding behavior in the hobby.
Mini-piranha
FishSerrasalmus sanchezi
A misidentified mini-piranha relative with razor teeth and a fiery red throat.
Minkley's Cichlid
FishHerichthys minckleyi
A rare Mexican cichlid from one of the world's most extraordinary desert springs.
Mirror Basslet
FishPseudanthias pleurotaenia
A rare, large anthias that demands respect, and space, in the reef tank.
Molly
FishPoecilia sphenops
A livebearer classic that can thrive from freshwater all the way to full marine conditions.
Molly Miller
FishScartella cristata
A tidepool blenny with a wild mohawk and an appetite for algae.
Monasteria Microporous Coral
CoralMontipora monasteriata
A tiered plating coral with subtle blue margins and a demanding personality.
Money Cowrie
InvertCypraea moneta
A living relic once traded as currency across cultures worldwide.
Montecristo Cichlid
FishVieja heterospila
A robust Central American cichlid from some of Mexico's most storied river systems.
Montezuma Swordtail
FishXiphophorus montezumae
A wild swordtail with an absurdly long tail sword that rivals its own body length.
Montipora Cap
CoralMontipora capricornis
A plating coral that builds dramatic layered shelves in purple, blue, or brown.
Moon Coral
CoralAstreopora longisepta
A rare Kenyan plating coral that rewards only the most dedicated reefers.
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.
Moonspot Licorice Gourami
FishParosphromenus linkei
A pint-sized blackwater gourami with head-down courtship displays unlike any other.
Moore's Lamprologus
FishVariabilichromis moorii
A Lake Tanganyika rockdweller with a fascinating family life and devious brood tactics.
Moorish Idol
FishZanclus canescens
Iconic reef wanderer with a dramatic look that rarely thrives in captivity.
Mosquitofish
FishGambusia affinis
The notorious mosquitofish: tough, prolific, and not a friendly neighbor.
Moth Catfish
FishHara jerdoni
A moth-like micro catfish from Indian hill streams, best kept in groups.
Mottled Catfish
FishAmarginops ornatus
A sleek Congo predator with ornate markings and serious attitude toward tankmates.
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.
Mountainous Star Coral
CoralOrbicella annularis
A reef-building powerhouse that forms the backbone of Caribbean coral ecosystems.
Moustache Jawfish
FishOpistognathus lonchurus
A bold little burrower with a face full of personality.
Mozambique tilapia
FishOreochromis mossambicus
One of the world's most invasive fish, sold as food and kept as a curiosity.
Mullya Garra
FishGarra mullya
A hardy Indian stream fish with a sucker disc built for fast-moving water.
Multibar Angelfish
FishCentropyge multifasciata
A deep-dwelling pygmy angel that rarely makes it into the hobby.
Multicolor angelfish
FishCentropyge multicolor
A deep-reef dweller with bold coloring that rarely makes it to store shelves.
Multicolour Dottyback
FishOgilbyina novaehollandiae
A vivid reef dweller from the Great Barrier Reef with a bold dual-tone look.
Multifasciatus
FishNeolamprologus multifasciatus
Possibly the world's smallest cichlid, big attitude packed into a tiny shell.
Mushroom Anemone
CoralCorynactis carnea
A low-light, reef-safe coral from the Southwest Atlantic suited to beginners.
Mushroom Coral
CoralCycloseris costulata
A free-living, disc-shaped coral that thrives on sandy reef slopes.
Mushroom Coral
CoralCycloseris curvata
A free-living, disc-shaped coral that thrives on sandy reef floors.