Species Catalogue
581 species matching your filters — care guides, community photos, water parameters, and tank-mate compatibility.
Maingano
Melanochromis cyaneorhabdos
Malaya Shrimp
Caridina malayensis
Marbled Hatchetfish
Carnegiella strigata
Marbled Headstander
Abramites hypselonotus
Marlier's Julie
Julidochromis marlieri
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.
Midas Cichlid
Amphilophus citrinellus
Midnight Catfish
Auchenipterichthys coracoideus
Millennium Rainbowfish
Glossolepis pseudoincisus
Mimic Tang
Acanthurus pyroferus
Mirabilis Killifish
Fundulopanchax mirabilis
Mischling Shrimp
Caridina sp. (Mischling)
Mosaic Axolotl
Ambystoma mexicanum
Myriophyllum Guyana
Myriophyllum sp. 'Guyana'
Myriophyllum Mattogrossense
Myriophyllum mattogrossense
Mystery Wrasse
Pseudocheilinus ocellatus
Narcissus Corydoras
Corydoras narcissus
Naso Tang
Naso lituratus
Neomeris
Neomeris annulata
Tiny, elegant calcified algae with a barrel-shaped body ringed with white calcium bands at the tip. Short-lived (weeks to months) but reproduces readily in stable reef tanks. An interesting hitchhiker and occasional deliberate addition. Fish tend to leave it alone due to calcification.
Neon Green Rasbora
Microdevario kubotai
Neon Red Crayfish
Cambarellus patzcuarensis var. Orange
Nesaea Crassicaulis
Nesaea crassicaulis
Nicaragua Cichlid
Hypsophrys nicaraguensis
Nijssen's Corydoras
Corydoras nijsseni
No Entry Shrimp
Caridina logemanni
Nothobranchius Killifish
Nothobranchius rachovii
Nymphaea Stellata
Nymphaea stellata
Ocellifer Synodontis
Synodontis ocellifer
One-Lined Pencilfish
Nannostomus unifasciatus
Opaline Gourami
Trichopodus trichopterus
Orange Eye Blue Tiger Shrimp
Caridina mariae var. OEBT
Orange Flash Cockatoo Dwarf Cichlid
Apistogramma cacatuoides
Ornate Bichir
Polypterus ornatipinnis
Ornate Ctenopoma
Microctenopoma ansorgii