Shoal & Stem

Species Catalogue

1,376 species — care guides, community photos, water parameters, and tank-mate compatibility.

shrimp
Xexpert

Sulawesi Cardinal Shrimp

Caridina dennerli

shrimpfreshwater
1″·10+ gal·group 6+·peaceful
shrimp
Xexpert

Sulawesi Harlequin Shrimp

Caridina spinata

shrimpfreshwater
1.2″·10+ gal·group 6+·peaceful
fish
intermediate

Sumo Loach

Schistura balteata

fishfreshwater
2.5″·15+ gal·group 3+·semi-aggr.
coral
advanced

Sun Coral

Tubastrea aurea

coralsaltwater
2″·30+ gal·peaceful
fish
beginner

Sunburst Platy

Xiphophorus maculatus

fishfreshwater
2.5″·10+ gal·group 3+·peaceful
shrimp
Mmedium

Sunkist Babaulti Shrimp

Caridina babaulti

shrimpfreshwater
1.5″·5+ gal·group 10+·peaceful
shrimp
Eeasy

Sunkist Shrimp

Neocaridina davidi

shrimpfreshwater
1.5″·5+ gal·group 10+·peaceful
fish
beginner

Sunset Honey Gourami

Trichogaster chuna

fishfreshwater
2″·10+ gal·peaceful
fish
beginner

Sunset Platy

Xiphophorus maculatus

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

Sunset Thicklip Gourami

Trichogaster labiosa

fishfreshwater
4″·20+ gal·peaceful
fish
advanced

Sunshine Pleco

Scobinancistrus aureatus

fishfreshwater
24″·150+ gal·peaceful
fish
beginner

Super Delta Betta

Betta splendens

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

Super Red Bristlenose Pleco

Ancistrus sp.

fishfreshwater
5″·20+ gal·peaceful
fish
intermediate

Surinam Eartheater

Geophagus surinamensis

fishfreshwater
10″·75+ gal·semi-aggr.
fish
beginner

Surinamensis Corydoras

Corydoras surinamensis

fishfreshwater
2.5″·15+ gal·group 6+·peaceful
invertebrate
beginner

Swamp Dwarf Crayfish

Cambarellus puer

invertebratefreshwater
1.4″·10+ gal·peaceful
fish
intermediate

Swamp Guppy

Micropoecilia picta

fishfreshwater
1.5″·10+ gal·group 3+·peaceful
plant
beginner

Swamp Hygrophila

Hygrophila costata

plantfreshwater

A robust, fast-growing species native to the Americas with broad, oval leaves and prominent veins. It adapts well to a wide range of water conditions and is commonly found in paludariums and low-tech setups. Produces beautiful purple flowers when grown emersed.

fish
beginner

Swordtail

Xiphophorus hellerii

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

Sychri Corydoras

Corydoras sychri

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

Syngonanthus Belem

Syngonanthus sp. 'Belem'

plantfreshwater

Smaller Syngonanthus with dense, compact rosette whorls along the stem. Very demanding — needs extremely soft, acidic water.

plant
advanced

Syngonanthus Macrocaulon

Syngonanthus macrocaulon

plantfreshwater

Tall, slender stem plant with star-shaped leaf whorls. Pale green with a unique structural form. Requires very soft water and CO2.

fish
intermediate

Synodontis Multipunctatus

Synodontis multipunctatus

fishfreshwater
11″·55+ gal·semi-aggr.
plant
beginner

Süsswassertang

Lomariopsis lineata

plantfreshwater

Often mistaken for a moss, Süsswassertang (German for 'freshwater seaweed') is actually a fern prothallus — the juvenile phase of a fern. It produces small, bright green, tear-drop-shaped cells that cluster into irregular clumps or sheets. Grows slowly and does not need to be attached — it can float freely or be loosely placed on hardscape. Very popular in shrimp tanks and nano setups due to its low-maintenance nature and the intricate hiding spaces it creates for juvenile shrimp.

fish
beginner

Tailspot Blenny

Ecsenius stigmatura

fishsaltwater
2.5″·20+ gal·peaceful
shrimp
Mmedium

Taitibee Shrimp

Caridina sp. (Taitibee)

shrimpfreshwater
1.2″·5+ gal·group 10+·peaceful
shrimp
Xexpert

Taiwan Bee Shrimp

Caridina logemanni

shrimpfreshwater
0.8″·10+ gal·group 10+·peaceful
plant
beginner

Taiwan Moss

Taxiphyllum alternans

plantfreshwater

Taiwan Moss is characterised by densely packed, small, round-tipped fronds that grow in a drooping or cascading habit, making it ideal for creating natural-looking hanging mosses on hardscape overhangs. Its fine texture creates a gentler, softer effect than Christmas Moss.

shrimp
intermediate

Tangerine Tiger Shrimp

Caridina serrata

shrimpfreshwater
1.2″·5+ gal·group 6+·peaceful
snail
beginner

Tectus Snail

Tectus fenestratus

snailsaltwater
2″·10+ gal·peaceful
fish
intermediate

Telescope Goldfish

Carassius auratus

fishfreshwater
7″·20+ gal·peaceful
fish
intermediate

Texas Cichlid

Herichthys cyanoguttatus

fishfreshwater
12″·55+ gal·aggressive
shrimp
intermediate

Thai Micro Crab

Limnopilos naiyanetri

shrimpfreshwater
0.4″·peaceful
fish
intermediate

Thick-Lipped Gourami

Trichopodus labiosus

fishfreshwater
4″·20+ gal·semi-aggr.
plant
Eeasy

Thor's Hammer Java Fern

Microsorum pteropus Thor's Hammer

plantfreshwater

Thor's Hammer Java Fern is a distinctive cultivar of Microsorum pteropus featuring unique, compact hammer-shaped or club-shaped fronds that set it apart from standard Java Fern varieties. This slow-growing epiphytic fern displays deep green coloration and creates an attractive, sculptural appearance in aquascapes. It is an excellent choice for beginners due to its extreme hardiness and minimal care requirements.

algae
intermediate

Thread Algae

Zygnema sp.

algaefreshwater

Very fine, dark green threads — slightly stiffer than Spirogyra and less silky. Wraps tightly around plant stems and mosses. Caused by low CO₂ and high light. Siamese Algae Eaters are one of the few fish that readily consume it.