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Species

Browsing 3,374 species. Use the filters below to narrow down.

Maldive Coral

Maldive Coral

Coral

Pavona maldivensis

A versatile, low-demand coral that shifts shape depending on where it grows.

Mandarin Dragonet

Mandarin Dragonet

Fish

Synchiropus splendidus

One of the most vividly colored fish on the reef, and one of the trickiest to keep.

Mandor

Mandor

Fish

Betta mandor

A small, secretive Bornean mouthbrooder best kept in quiet, species-focused setups.

Manduba, Slopehead Catfish

Manduba, Slopehead Catfish

Fish

Ageneiosus inermis

A giant, predatory catfish with one of the most unusual reproductive strategies in freshwater.

Mantis Shrimp

Mantis Shrimp

Invert

Odontodactylus havanensis

A Brazilian Atlantic crustacean that brings serious predator energy to the right tank.

Many Barred Distichodus

Many Barred Distichodus

Fish

Distichodus fasciolatus

A boldly barred Congo giant that stays surprisingly peaceful for its size.

Many-spined Cowfish

Many-spined Cowfish

Fish

Lactoria diaphana

A boxy, horned oddity that roams reefs and mudflats across the entire Indo-Pacific.

Marakely

Marakely

Fish

Paratilapia polleni

Madagascar's endangered black cichlid, bold in personality and beautiful in the biotope

Marbled Climbing Perch

Marbled Climbing Perch

Fish

Ctenopoma weeksii

A cryptic Congo predator that vanishes into leaf litter before your eyes.

Marbled Crayfish

Marbled Crayfish

Invert

Procambarus virginalis

The only known parthenogenetic crayfish. Every individual is female and a perfect clone.

Marbled Crayfish

Marbled Crayfish

Invert

Cherax peknyi

A bold Australian freshwater crayfish with personality to spare.

Marbled Goby

Marbled Goby

Fish

Oxyeleotris marmorata

A motionless giant that eats anything fitting in its enormous mouth.

Marbled Goby

Marbled Goby

Fish

Pomatoschistus marmoratus

A cryptic little sand-dweller from Europe's coasts, full of quiet personality.

Marbled Hatchetfish

Marbled Hatchetfish

Fish

Carnegiella strigata

A deep-keeled surface dweller that brings life to the upper third of any tank.

Marbled Lungfish

Marbled Lungfish

Fish

Protopterus aethiopicus aethiopicus

An ancient African lungfish that breathes air and can outlast a drought.

Marbled Lyretail

Marbled Lyretail

Fish

Fundulopanchax marmoratus

A rare Cameroonian killifish with detailed marbled patterning and a preference for cool water.

Marbled Synodontis

Marbled Synodontis

Fish

Synodontis schoutedeni

A beginner-friendly Congo catfish with bold marbled patterning that deepens with age.

Marble Shrimp

Marble Shrimp

Invert

Saron marmoratus

A boldly patterned reef shrimp that hides by day and roams by night.

Marimo Moss Ball

Marimo Moss Ball

Plant

Aegagropila linnaei

The algae ball that's actually welcome in your tank.

Marine Betta

Marine Betta

Fish

Calloplesiops altivelis

A cave-dwelling mimic that fools predators by impersonating a moray eel.

Marine Nerite Snail

Marine Nerite Snail

Invert

Vittina coromandeliana

A tough little grazer that keeps reef glass spotlessly clean.

Mario's cory

Mario's cory

Fish

Corydoras pinheiroi

A rare Amazonian cory that can breathe air and live for decades.

Maroon Clownfish

Maroon Clownfish

Fish

Amphiprion tricinctus

Three bold white bars on deep orange. The Marshall Islands' own anemonefish.

Maroon Clownfish

Maroon Clownfish

Fish

Premnas biaculeatus

The boldest clownfish in the hobby, and it knows it.

Masked Angelfish

Masked Angelfish

Fish

Genicanthus personatus

A rare Hawaiian endemic that's one of the most coveted angels in the hobby.

Masked Julie

Masked Julie

Fish

Julidochromis transcriptus

A bold little rock-dweller from Lake Tanganyika with sharp black-and-white contrast.

Masked Puffer

Masked Puffer

Fish

Arothron diadematus

A bold Red Sea puffer with a dramatic masked face and serious bite.

Masken Apisto

Masken Apisto

Fish

Apistogramma paulmuelleri

A tiny Peruvian dwarf cichlid with outsized color and surprisingly bold personality.

Massive Starlet Coral

Massive Starlet Coral

Coral

Siderastrea siderea

A boulder-forming reef coral that builds colonies wider than you are tall.

Mat Zoanthid

Mat Zoanthid

Coral

Zoanthus pulchellus

A hardy Western Atlantic zoanthid that forms colorful, spreading mats on the reef.

Maulbrüter Apisto

Maulbrüter Apisto

Fish

Apistogramma barlowi

The only Apistogramma that mouthbroods. Or doesn't, depending on its mood.

Maxima Clam

Maxima Clam

Invert

Tridacna maxima

A living jewel for the reef tank, with a lifespan that can outlast your mortgage.

Mayan Cichlid

Mayan Cichlid

Fish

Cichlasoma urophthalmus

A brackish-tolerant bruiser that can handle conditions few other cichlids can.

Maya Tetra

Maya Tetra

Fish

Hyphessobrycon compressus

The founding species of its entire genus, rarely seen in the hobby.

Maze Coral

Maze Coral

Coral

Meandrina jacksoni

A rare Atlantic maze coral with a very limited Caribbean range.

Mbu Puffer

Mbu Puffer

Fish

Tetraodon mbu

A Congo giant that demands respect, space, and a very sturdy tank.