Species Catalogue
1,492 species — care guides, community photos, water parameters, and tank-mate compatibility.
Marsilea Hirsuta
Marsilea hirsuta
Marsilea Minuta
Marsilea minuta
Marsilea Quadrifolia
Marsilea quadrifolia
Mayaca Fluviatilis
Mayaca fluviatilis
Maze Brain Coral
Platygyra daedalea
Mbu Puffer
Tetraodon mbu
McCosker's Flasher Wrasse
Paracheilinus mccoskeri
Medaka
Oryzias latipes
Melanistius Corydoras
Corydoras melanistius
Melanoid Axolotl
Ambystoma mexicanum
Melanurus Wrasse
Halichoeres melanurus
Melon Barb
Haludaria fasciata
Melon Sword
Echinodorus osiris
Mermaid's Fan
Udotea flabellum
Elegant fan-shaped calcified macroalgae on a slender white stalk. Grows in sandy areas near reefs and seagrass beds. A beautiful decorative species for low-flow areas of the display tank. Like Penicillus, it anchors in deep sand and has a natural lifespan of several months.
Mermaid's Wine Glass
Acetabularia acetabulum
One of the most extraordinary organisms in biology — a single giant cell shaped like a wine glass on a slender stalk. Each 'plant' is a single cell that can grow to 10 cm. Famous in cell biology research. In aquariums it anchors in sand and is a remarkable conversation piece. Prefers cooler, calcium-rich water.
Mexican Dwarf Crayfish
Cambarellus patzcuarensis
Mexican Oak Leaf
Shinnersia rivularis
Mickey Mouse Platy
Xiphophorus maculatus
Micrantha Lily
Nymphaea micrantha
Micranthemum Umbrosum
Micranthemum umbrosum
Microsorum Pteropus Needle Leaf
Microsorum pteropus 'Needle Leaf'
Midas Blenny
Ecsenius midas
Midas Cichlid
Amphilophus citrinellus
Midnight Catfish
Auchenipterichthys thoracatus
Millennium Rainbowfish
Glossolepis pseudoincisus
Mimic Tang
Acanthurus pyroferus
Mini Christmas Moss
Vesicularia sp. 'Mini Christmas'
Mini Eriocaulon
Eriocaulon cinereum
Tiny rosette plant forming grass-like tufts. One of the most challenging aquarium plants to keep long-term. Needs very soft, acidic water, strong light, and CO2.
Mini Fissidens
Fissidens splachnobryoides
Mini Fissidens is a delicate, slow-growing moss with tiny, feathery fronds that create an intricate, lacy appearance. It features small, finely divided leaves arranged in a distinctive two-ranked pattern, giving it a refined aesthetic ideal for detailed aquascaping. This moss is prized for its ability to attach to hardscape and create natural-looking moss walls or carpets in foreground and midground areas.
Mirabilis Killifish
Fundulopanchax mirabilis
Mischling Shrimp
Caridina sp. (Mischling)
Monte Carlo
Micranthemum tweediei
Montipora
Montipora sp.
Moonlight Gourami
Trichopodus microlepis
Moorish Idol
Zanclus cornutus
Mosaic Axolotl
Ambystoma mexicanum