Shoal & Stem

Species Catalogue

709 species matching your filters — care guides, community photos, water parameters, and tank-mate compatibility.

fish
beginner

Malabar Danio

Devario malabaricus

fishfreshwater
3.5″·20+ gal·group 6+·peaceful
fish
Xexpert

Mandarin Dragonet

Synchiropus splendidus

fishsaltwater
3″·30+ gal·peaceful
fish
intermediate

Marble Angelfish

Pterophyllum scalare

fishfreshwater
6″·30+ gal·group 2+·semi-aggr.
fish
beginner

Marble Betta

Betta splendens 'Marble'

fishfreshwater
2.5″·5+ gal·semi-aggr.
fish
beginner

Marble Molly

Poecilia sphenops

fishfreshwater
3″·20+ gal·group 3+·peaceful
fish
intermediate

Marbled Hatchetfish

Carnegiella strigata

fishfreshwater
1.5″·15+ gal·group 6+·peaceful
fish
beginner

Maroon Clownfish

Premnas biaculeatus

fishsaltwater
6″·30+ gal·group 2+·aggressive
fish
Xexpert

Mbu Puffer

Tetraodon mbu

fishfreshwater
26″·300+ gal·aggressive
fish
beginner

McCosker's Flasher Wrasse

Paracheilinus mccoskeri

fishsaltwater
3.5″·55+ gal·peaceful
fish
beginner

Medaka

Oryzias latipes

fishfreshwater
1.5″·10+ gal·group 6+·peaceful
fish
beginner

Melanistius Corydoras

Corydoras melanistius

fishfreshwater
2″·15+ gal·group 6+·peaceful
fish
beginner

Melanurus Wrasse

Halichoeres melanurus

fishsaltwater
5″·30+ gal·semi-aggr.
fish
beginner

Mickey Mouse Platy

Xiphophorus maculatus

fishfreshwater
2.5″·10+ gal·group 3+·peaceful
fish
beginner

Midas Blenny

Ecsenius midas

fishsaltwater
5″·30+ gal·semi-aggr.
fish
intermediate

Millennium Rainbowfish

Glossolepis pseudoincisus

fishfreshwater
4″·30+ gal·group 6+·peaceful
fish
intermediate

Mimic Tang

Acanthurus pyroferus

fishsaltwater
10″·75+ gal·semi-aggr.
fish
Mmedium

Mirabilis Killifish

Fundulopanchax mirabilis

fishfreshwater
2.5″·20+ gal·semi-aggr.
fish
beginner

Molly

Poecilia sphenops

fishfreshwater
3″·15+ gal·group 3+·peaceful
fish
beginner

Moonlight Gourami

Trichopodus microlepis

fishfreshwater
6″·30+ gal·peaceful
fish
advanced

Moorish Idol

Zanclus cornutus

fishsaltwater
9″·100+ gal·peaceful
fish
beginner

Mosaic Guppy

Poecilia reticulata

fishfreshwater
2″·10+ gal·group 3+·peaceful
fish
beginner

Moscow Blue Guppy

Poecilia reticulata

fishfreshwater
2″·10+ gal·group 3+·peaceful
fish
beginner

Moscow Guppy

Poecilia reticulata

fishfreshwater
2.5″·10+ gal·group 3+·peaceful
Mosquitofishbeginner

Mosquitofish

Gambusia affinis

fishfreshwater
2.5″·10+ gal·semi-aggr.
fish
advanced

Mudskipper

Periophthalmus barbarus

fishbrackish
6″·30+ gal·semi-aggr.
fish
beginner

Multi Shell Dweller

Neolamprologus multifasciatus

fishfreshwater
1.5″·10+ gal·semi-aggr.
fish
intermediate

Mystery Wrasse

Pseudocheilinus ocellatus

fishsaltwater
5″·30+ gal·semi-aggr.
fish
intermediate

Narcissus Corydoras

Corydoras narcissus

fishfreshwater
2.5″·15+ gal·group 6+·peaceful
fish
intermediate

Naso Tang

Naso lituratus

fishsaltwater
18″·150+ gal·semi-aggr.
fish
beginner

Nattereri Corydoras

Corydoras nattereri

fishfreshwater
2″·15+ gal·group 6+·peaceful
fish
beginner

Neon Blue Dwarf Gourami

Trichogaster lalius

fishfreshwater
3.5″·10+ gal·peaceful
fish
beginner

Neon Dwarf Gourami

Trichogaster lalius

fishfreshwater
3.5″·15+ gal·semi-aggr.
fish
beginner

Neon Goby

Elacatinus oceanops

fishsaltwater
2″·20+ gal·group 2+·peaceful
fish
intermediate

Neon Green Rasbora

Microdevario kubotai

fishfreshwater
1.5″·10+ gal·group 6+·peaceful
fish
beginner

Neon Rainbowfish

Melanotaenia praecox

fishfreshwater
3″·20+ gal·group 6+·peaceful
fish
intermediate

Neon Rasbora

Sundadanio axelrodi

fishfreshwater
1.5″·10+ gal·group 6+·peaceful