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Species

Browsing 807 species. Use the filters below to narrow down.

Longnose Hawkfish

Longnose Hawkfish

Fish

Oxycirrhites typus

A perching ambush predator that claims gorgonians as its personal throne.

Longsnouted Pipefish

Longsnouted Pipefish

Fish

Doryichthys martensii

A slender, pipe-bodied hunter that lets the male handle all the parenting duties.

Longspine Cardinal

Longspine Cardinal

Fish

Zoramia leptacantha

A tiny reef cardinalfish that gathers in shimmering clouds above branching coral.

Longspine seahorse

Longspine seahorse

Fish

Hippocampus histrix

A thorny Indo-Pacific seahorse with dramatic spines and a delicate nature.

Long whiskers catfish

Long whiskers catfish

Fish

Mystus gulio

A schooling brackish catfish that grows surprisingly large and breathes air.

Lubbock's Wrasse

Lubbock's Wrasse

Fish

Cirrhilabrus lubbocki

A social, zooplankton-hunting wrasse that thrives in lively reef communities.

Lyretail anthias

Lyretail anthias

Fish

Pseudanthias squamipinnis

Schooling reef anthias that shifts from female orange to vivid male purple.

Lyretail Apistogramma

Lyretail Apistogramma

Fish

Apistogramma pantalone

A tiny Peruvian dwarf cichlid with courtship rituals unlike any other Apistogramma.

Macculloch's Rainbowfish

Macculloch's Rainbowfish

Fish

Melanotaenia maccullochi

A compact, peaceful rainbowfish that rewards group keeping with vivid male displays.

Macmaster's Dwarf Cichlid

Macmaster's Dwarf Cichlid

Fish

Apistogramma macmasteri

A compact Colombian cichlid with big personality and fascinating cave-breeding behavior.

Maeklong Chameleon Catfish

Maeklong Chameleon Catfish

Fish

Acrochordonichthys septentrionalis

A skin-shedding hill stream catfish that keeps its tankmates on their toes.

Mahachai Betta

Mahachai Betta

Fish

Betta mahachaiensis

A nipa palm specialist from coastal Thailand with iridescent blue-green armor.

Mailfish

Mailfish

Fish

Cleidopus gloriamaris

A living lantern: the fish that carries its own lights on its jaw.

Malawi Eyebiter

Malawi Eyebiter

Fish

Dimidiochromis compressiceps

The Lake Malawi ambush hunter famous for a truly unsettling feeding habit.

Malawi Hawk Cichlid

Malawi Hawk Cichlid

Fish

Aristochromis christyi

Lake Malawi's sneaky ambush predator that rolls sideways to fool its prey.

Malayan Leaffish

Malayan Leaffish

Fish

Pristolepis fasciata

A bold, deep-bodied predator from Southeast Asian floodplains with real personality.

Malayan Loach

Malayan Loach

Fish

Pangio semicincta

The fish sold as kuhli loach is almost certainly this one instead.

Malay glass catfish

Malay glass catfish

Fish

Ompok eugeneiatus

A shy, schooling catfish from Southeast Asian peat swamps and flooded forests.

Manduba, Slopehead Catfish

Manduba, Slopehead Catfish

Fish

Ageneiosus inermis

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

Many-spined Cowfish

Many-spined Cowfish

Fish

Lactoria diaphana

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

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.

Marine Betta

Marine Betta

Fish

Calloplesiops altivelis

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

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.

Maulbrüter Apisto

Maulbrüter Apisto

Fish

Apistogramma barlowi

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

Mbu Puffer

Mbu Puffer

Fish

Tetraodon mbu

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

Mccosker's Flasher

Mccosker's Flasher

Fish

Paracheilinus mccoskeri

A tiny reef wrasse where the males put on a color show like no other.

Mcculloch's Anemonefish

Mcculloch's Anemonefish

Fish

Amphiprion mccullochi

A rare island endemic with a bold personality that punches well above its size.

Media Luna Pupfish

Media Luna Pupfish

Fish

Cualac tessellatus

A rare Mexican pupfish with a conservation story worth getting behind.

Mediterranean Fried Egg Jellyfish

Mediterranean Fried Egg Jellyfish

Invert

Cotylorhiza tuberculata

The Mediterranean jellyfish that looks exactly like a fried egg.

Mediterranean Killifish

Mediterranean Killifish

Fish

Aphanius fasciatus

A rare Mediterranean killifish that rewards dedicated keepers with fascinating, constant activity.

Mekong Croaking Gourami

Mekong Croaking Gourami

Fish

Trichopsis schalleri

The tiny gourami that actually produces sounds to resolve conflicts and court mates.