Species
Browsing 3,374 species. Use the filters below to narrow down.
Maldive Coral
CoralPavona maldivensis
A versatile, low-demand coral that shifts shape depending on where it grows.
Mandarin Dragonet
FishSynchiropus splendidus
One of the most vividly colored fish on the reef, and one of the trickiest to keep.
Mandor
FishBetta mandor
A small, secretive Bornean mouthbrooder best kept in quiet, species-focused setups.
Manduba, Slopehead Catfish
FishAgeneiosus inermis
A giant, predatory catfish with one of the most unusual reproductive strategies in freshwater.
Mantis Shrimp
InvertOdontodactylus havanensis
A Brazilian Atlantic crustacean that brings serious predator energy to the right tank.
Many Barred Distichodus
FishDistichodus fasciolatus
A boldly barred Congo giant that stays surprisingly peaceful for its size.
Many-spined Cowfish
FishLactoria diaphana
A boxy, horned oddity that roams reefs and mudflats across the entire Indo-Pacific.
Marakely
FishParatilapia polleni
Madagascar's endangered black cichlid, bold in personality and beautiful in the biotope
Marbled Climbing Perch
FishCtenopoma weeksii
A cryptic Congo predator that vanishes into leaf litter before your eyes.
Marbled Crayfish
InvertProcambarus virginalis
The only known parthenogenetic crayfish. Every individual is female and a perfect clone.
Marbled Crayfish
InvertCherax peknyi
A bold Australian freshwater crayfish with personality to spare.
Marbled Goby
FishOxyeleotris marmorata
A motionless giant that eats anything fitting in its enormous mouth.
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 Lungfish
FishProtopterus aethiopicus aethiopicus
An ancient African lungfish that breathes air and can outlast a drought.
Marbled Lyretail
FishFundulopanchax marmoratus
A rare Cameroonian killifish with detailed marbled patterning and a preference for cool water.
Marbled Synodontis
FishSynodontis schoutedeni
A beginner-friendly Congo catfish with bold marbled patterning that deepens with age.
Marble Shrimp
InvertSaron marmoratus
A boldly patterned reef shrimp that hides by day and roams by night.
Marimo Moss Ball
PlantAegagropila linnaei
The algae ball that's actually welcome in your tank.
Marine Betta
FishCalloplesiops altivelis
A cave-dwelling mimic that fools predators by impersonating a moray eel.
Marine Nerite Snail
InvertVittina coromandeliana
A tough little grazer that keeps reef glass spotlessly clean.
Mario's cory
FishCorydoras pinheiroi
A rare Amazonian cory that can breathe air and live for decades.
Maroon Clownfish
FishAmphiprion tricinctus
Three bold white bars on deep orange. The Marshall Islands' own anemonefish.
Maroon Clownfish
FishPremnas biaculeatus
The boldest clownfish in the hobby, and it knows it.
Masked Angelfish
FishGenicanthus personatus
A rare Hawaiian endemic that's one of the most coveted angels in the hobby.
Masked Julie
FishJulidochromis transcriptus
A bold little rock-dweller from Lake Tanganyika with sharp black-and-white contrast.
Masked Puffer
FishArothron diadematus
A bold Red Sea puffer with a dramatic masked face and serious bite.
Masken Apisto
FishApistogramma paulmuelleri
A tiny Peruvian dwarf cichlid with outsized color and surprisingly bold personality.
Massive Starlet Coral
CoralSiderastrea siderea
A boulder-forming reef coral that builds colonies wider than you are tall.
Mat Zoanthid
CoralZoanthus pulchellus
A hardy Western Atlantic zoanthid that forms colorful, spreading mats on the reef.
Maulbrüter Apisto
FishApistogramma barlowi
The only Apistogramma that mouthbroods. Or doesn't, depending on its mood.
Maxima Clam
InvertTridacna maxima
A living jewel for the reef tank, with a lifespan that can outlast your mortgage.
Mayan Cichlid
FishCichlasoma urophthalmus
A brackish-tolerant bruiser that can handle conditions few other cichlids can.
Maya Tetra
FishHyphessobrycon compressus
The founding species of its entire genus, rarely seen in the hobby.
Maze Coral
CoralMeandrina jacksoni
A rare Atlantic maze coral with a very limited Caribbean range.
Mbu Puffer
FishTetraodon mbu
A Congo giant that demands respect, space, and a very sturdy tank.