Shoal & Stem

Species Catalogue

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

Neon Tetrabeginner

Neon Tetra

Paracheirodon innesi

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

Niger Triggerfish

Odonus niger

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

Nijssen's Corydoras

Corydoras nijsseni

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

Norman's Lampeye

Poropanchax normani

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

Norman's Lampeye Killifish

Poropanchax normani

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

Nothobranchius Killifish

Nothobranchius rachovii

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

Ocellaris Clownfish

Amphiprion ocellaris

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

Ocellifer Synodontis

Synodontis ocellifer

fishfreshwater
8″·40+ gal·peaceful
fish
beginner

Odessa Barb

Pethia padamya

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

One-Lined Pencilfish

Nannostomus unifasciatus

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

Opaline Gourami

Trichopodus trichopterus

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

Oranda Goldfish

Carassius auratus

fishfreshwater
8″·20+ gal·peaceful
fish
intermediate

Orange Flash Cockatoo Dwarf Cichlid

Apistogramma cacatuoides

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

Orange Molly

Poecilia sphenops

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

Orange Swordtail

Xiphophorus hellerii

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

Orange-Finned Danio

Danio kyathit

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

Orchid Dottyback

Pseudochromis fridmani

fishsaltwater
3″·30+ gal·aggressive
fish
beginner

Orchid Endler

Poecilia wingei

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

Ornate Bichir

Polypterus ornatipinnis

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

Ornate Ctenopoma

Microctenopoma ansorgii

fishfreshwater
1.5″·10+ gal·peaceful
fish
Eeasy

Ornate Tetra

Hyphessobrycon bentosi

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

Oscar

Astronotus ocellatus

fishfreshwater
12″·75+ gal·aggressive
fish
intermediate

Otocinclus

Otocinclus vittatus

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

Pacific Blue Eye

Pseudomugil signifer

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

Pacu

Colossoma macropomum

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

Pajama Cardinalfish

Sphaeramia nematoptera

fishsaltwater
3.5″·30+ gal·group 3+·peaceful
fish
beginner

Panda Corydoras

Corydoras panda

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

Panda Dwarf Cichlid

Apistogramma nijsseni

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

Panda Garra

Garra flavatra

fishfreshwater
3.5″·30+ gal·group 4+·peaceful
fish
beginner

Panda Platy

Xiphophorus maculatus

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

Panda Tetra

Aphyocharax paraguayensis

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

Panduro Dwarf Cichlid

Apistogramma panduro

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

Paradise Fish

Macropodus opercularis

fishfreshwater
4″·20+ gal·aggressive
fish
beginner

Parkinsoni Rainbowfish

Melanotaenia parkinsoni

fishfreshwater
4.5″·30+ gal·group 6+·peaceful
fish
beginner

Paskai Rainbowfish

Pseudomugil paskai

fishfreshwater
1.2″·10+ gal·group 6+·peaceful
fish
beginner

Pea Puffer

Carinotetraodon travancoricus

fishfreshwater
1.5″·10+ gal·aggressive