Shoal & Stem

Species Catalogue

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

fish
easy

Moscow Guppy

Poecilia reticulata

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

Mudskipper

Periophthalmus barbarus

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

Multi Shell Dweller

Neolamprologus multifasciatus

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

Mystery Wrasse

Pseudocheilinus ocellatus

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

Narcissus Corydoras

Corydoras narcissus

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

Naso Tang

Naso lituratus

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

Nattereri Corydoras

Corydoras nattereri

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

Neon Blue Dwarf Gourami

Trichogaster lalius

fishfreshwater
3.5″·10+ gal·peaceful
fish
easy

Neon Dwarf Gourami

Trichogaster lalius

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

Neon Goby

Elacatinus oceanops

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

Neon Green Rasbora

Microdevario kubotai

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

Neon Rasbora

Sundadanio axelrodi

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

Nicaragua Cichlid

Hypsophrys nicaraguensis

fishfreshwater
8″·55+ gal·aggressive
fish
easy

Niger Triggerfish

Odonus niger

fishsaltwater
18″·100+ gal·semi-aggr.
fish
medium

Nijssen's Corydoras

Corydoras nijsseni

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

Norman's Lampeye

Poropanchax normani

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

Nothobranchius Killifish

Nothobranchius rachovii

fishfreshwater
2″·10+ gal·semi-aggr.
fish
easy

Ocellaris Clownfish

Amphiprion ocellaris

fishsaltwater
3.5″·20+ gal·group 2+·semi-aggr.
fish
medium

Ocellifer Synodontis

Synodontis ocellifer

fishfreshwater
8″·40+ gal·peaceful
fish
easy

Odessa Barb

Pethia padamya

fishfreshwater
3″·20+ gal·group 6+·semi-aggr.
fish
medium

One-Lined Pencilfish

Nannostomus unifasciatus

fishfreshwater
1.4″·10+ gal·group 6+·peaceful
fish
medium

Opaline Gourami

Trichopodus trichopterus

fishfreshwater
5″·20+ gal·semi-aggr.
fish
medium

Oranda Goldfish

Carassius auratus

fishfreshwater
8″·20+ gal·peaceful
fish
medium

Orange Flash Cockatoo Dwarf Cichlid

Apistogramma cacatuoides

fishfreshwater
3″·20+ gal·group 2+·semi-aggr.
fish
easy

Orange Molly

Poecilia sphenops

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

Orange Swordtail

Xiphophorus hellerii

fishfreshwater
4.5″·20+ gal·group 3+·peaceful
fish
easy

Orange-Finned Danio

Danio kyathit

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

Orchid Dottyback

Pseudochromis fridmani

fishsaltwater
3″·30+ gal·aggressive
fish
easy

Orchid Endler

Poecilia wingei

fishfreshwater
1.2″·5+ gal·group 3+·peaceful
fish
medium

Ornate Bichir

Polypterus ornatipinnis

fishfreshwater
18″·90+ gal·semi-aggr.
fish
medium

Ornate Ctenopoma

Microctenopoma ansorgii

fishfreshwater
1.5″·10+ gal·peaceful
fish
medium

Ornate Julie

Julidochromis ornatus

fishfreshwater
3.5″·20+ gal·peaceful
fish
hard

Ornate Pimelodus

Pimelodus ornatus

fishfreshwater
14″·180+ gal·semi-aggr.
fish
easy

Oscar

Astronotus ocellatus

fishfreshwater
12″·75+ gal·aggressive
fish
easy

Pacific Blue Eye

Pseudomugil signifer

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

Pacu

Colossoma macropomum

fishfreshwater
42″·500+ gal·semi-aggr.