Shoal & Stem

Species Catalogue

1,444 species — care guides, community photos, water parameters, and tank-mate compatibility.

fish
easy

Sodalis Corydoras

Corydoras sodalis

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

South America Moss

Taxiphyllum sp. 'South America'

plantfreshwater
Epiphyte·Slow growth
fish
medium

South American Puffer

Colomesus asellus

fishfreshwater
3.5″·30+ gal·group 3+·semi-aggr.
fish
easy

Spade Tail Betta

Betta splendens

fishfreshwater
3″·5+ gal·semi-aggr.
fish
easy

Spanner Barb

Barbodes lateristriga

fishfreshwater
7″·40+ gal·group 5+·peaceful
fish
easy

Sparkling Gourami

Trichopsis pumila

fishfreshwater
1.5″·10+ gal·group 3+·peaceful
fish
expert

Spike-Tail Licorice Gourami

Parosphromenus ornaticauda

fishfreshwater
1.2″·10+ gal·peaceful
plant
easy

Spiky Moss

Taxiphyllum sp. 'Spiky'

plantfreshwater
Epiphyte·Low–Medium light·Moderate growth
algae
easy

Spirogyra

Spirogyra sp.

algaefreshwater

Bright green filamentous algae with distinctive spiral chloroplasts. In small amounts it's a natural part of the ecosystem and a food source for many invertebrates. Can quickly overtake a tank if nutrients or CO₂ are out of balance. Best controlled by reducing phosphates and manual removal.

snail
easy

Spixi Snail

Asolene spixi

snailfreshwater
1.2″·10+ gal·peaceful
fish
medium

Splash Tetra

Copella arnoldi

fishfreshwater
3″·20+ gal·group 4+·peaceful
fish
medium

Spotted Blue Eye Rainbowfish

Pseudomugil gertrudae

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

Spotted Checkerboard Cichlid

Dicrossus maculatus

fishfreshwater
1.5″·10+ gal·peaceful
fish
medium

Spotted Climbing Perch

Ctenopoma acutirostre

fishfreshwater
3.5″·20+ gal·peaceful
fish
easy

Spotted Danio

Danio nigrofasciatus

fishfreshwater
1.8″·10+ gal·group 6+·peaceful
fish
hard

Spotted Dragonet

Synchiropus picturatus

fishsaltwater
3″·55+ gal·peaceful
fish
expert

Spotted Gar

Lepisosteus oculatus

fishfreshwater
24″·75+ gal·aggressive
shrimp
medium

Spotted Head Pinto Shrimp

Caridina logemanni

shrimpfreshwater
1.25″·5+ gal·group 10+·peaceful
fish
medium

Spotted Headstander

Chilodus punctatus

fishfreshwater
6″·55+ gal·semi-aggr.
fish
easy

Spotted Rainbowfish

Melanotaenia maccullochi

fishfreshwater
2.8″·20+ gal·group 4+·peaceful
fish
easy

Spotted Raphael Catfish

Agamyxis pectinifrons

fishfreshwater
6″·30+ gal·peaceful
fish
easy

Springeri Dottyback

Pseudochromis springeri

fishsaltwater
2.5″·30+ gal·semi-aggr.
shrimp
medium

Sri Lanka Fan Shrimp

Atya scabra

shrimpfreshwater
2″·20+ gal·peaceful
algae
hard

Staghorn Algae

Compsopogon sp.

algaefreshwater

Grey-green single strands that branch into antler-like forks — often tangled in plant leaves and filter intakes. Like BBA, it signals CO₂ problems. More responsive to spot-treatment with liquid carbon than BBA. Siamese Algae Eaters will consume it.

moss
hard

Star Moss

Tortula ruralis

mossfreshwater

Star Moss (Tortula ruralis) is a terrestrial moss species occasionally used in paludariums and riparian aquascaping, though it is not a true aquatic plant. It features fine, delicate branching with small leaves and a distinctive star-like appearance when viewed from above. This moss is extremely hardy and desiccation-tolerant but struggles when fully submerged for extended periods.

coral
easy

Star Polyps

Briareum spp.

coralsaltwater
2″·30+ gal·peaceful
plant
medium

Starhorn / Hygrophila auriculata

Hygrophila auriculata

plantfreshwater
Background·Medium–high light
fish
easy

Starry Blenny

Salarias ramosus

fishsaltwater
5″·30+ gal·peaceful
plant
medium

Staurogyne Repens

Staurogyne repens

plantfreshwater
Carpet·Medium to high light·Slow growth
fish
easy

Sterbai Corydoras

Corydoras sterbai

fishfreshwater
2.5″·20+ gal·group 6+·peaceful
fish
medium

Stiphodon Goby

Stiphodon ornatus

fishfreshwater
2″·15+ gal·group 3+·peaceful
snail
easy

Stomatella Snail

Stomatella varia

snailsaltwater
1″·10+ gal·peaceful
fish
medium

Strawberry Betta

Betta albimarginata

fishfreshwater
1.5″·5+ gal·semi-aggr.
fish
easy

Strawberry Rasbora

Boraras naevus

fishfreshwater
0.7″·5+ gal·group 8+·peaceful
plant
easy

String Moss

Leptodictyum riparium

plantfreshwater
Epiphyte·Low to medium light·Medium growth
fish
easy

Striped Panchax

Aplocheilus lineatus

fishfreshwater
4″·20+ gal·semi-aggr.