Shoal & Stem

Species Catalogue

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

shrimp
medium

Thai Micro Crab

Limnopilos naiyanetri

shrimpfreshwater
0.4″·peaceful
fish
medium

Thick-Lipped Gourami

Trichopodus labiosus

fishfreshwater
4″·20+ gal·semi-aggr.
algae
medium

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.

fish
medium

Threadfin Acara

Acarichthys heckelii

fishfreshwater
8″·55+ gal·peaceful
fish
medium

Three-lined Pencilfish

Nannostomus trifasciatus

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

Three-stripe Damsel

Dascyllus aruanus

fishsaltwater
4″·30+ gal·group 5+·aggressive
fish
medium

Three-stripe Dwarf Cichlid

Apistogramma trifasciata

fishfreshwater
2.5″·20+ gal·group 2+·semi-aggr.
shrimp
medium

Tibee Shrimp

Caridina sp. (Tibee)

shrimpfreshwater
1.25″·5+ gal·group 10+·peaceful
plant
easy

Tiger Lotus

Nymphaea zenkeri

plantfreshwater
Midground·Medium–High light·Fast growth
snail
easy

Tiger Nerite Snail

Vittina semiconica

snailfreshwater
1″·5+ gal·peaceful
fish
medium

Tiger Oscar

Astronotus ocellatus

fishfreshwater
14″·75+ gal·semi-aggr.
shrimp
hard

Tiger Shrimp

Caridina mariae

shrimpfreshwater
1.2″·5+ gal·group 6+·peaceful
plant
medium

Tiger Water Lily

Nymphaea lotus

plantfreshwater
Floating·Med/High light·Moderate growth
fish
medium

Tinfoil Barb

Barbonymus schwanenfeldii

fishfreshwater
14″·75+ gal·group 4+·peaceful
fish
hard

Tire Track Eel

Mastacembelus favus

fishfreshwater
28″·75+ gal·semi-aggr.
coral
easy

Toadstool Coral

Sarcophyton trocheliophorum

coralsaltwater
2″·50+ gal·peaceful
fish
easy

Tomato Clownfish

Amphiprion frenatus

fishsaltwater
5″·30+ gal·group 2+·semi-aggr.
plant
hard

Tonina Belem

Tonina sp. 'Belem'

plantfreshwater
Midground·Slow growth
plant
hard

Tonina Fluviatilis

Tonina fluviatilis

plantfreshwater
Background·High light·Slow growth
plant
expert

Tonina Lotus Blossom

Tonina fluviatilis Lotus Blossom

plantfreshwater
Midground·Slow growth
coral
medium

Torch Coral

Euphyllia glabrescens

coralsaltwater
2″·30+ gal·peaceful
fish
medium

Torpedo Dwarf Cichlid

Taeniacara candidi

fishfreshwater
2.5″·20+ gal·peaceful
fish
medium

Trifasciata Dwarf Cichlid

Apistogramma trifasciata

fishfreshwater
2.5″·20+ gal·semi-aggr.
snail
easy

Trochus Snail

Trochus sp.

snailsaltwater
2″·10+ gal·peaceful
fish
hard

Tropheus

Tropheus moorii

fishfreshwater
5″·75+ gal·group 12+·aggressive
fish
easy

True Percula Clownfish

Amphiprion percula

fishsaltwater
3″·20+ gal·group 2+·semi-aggr.
fish
medium

Tukano Corydoras

Corydoras tukano

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

Turbo Snail

Turbo fluctuosus

snailsaltwater
2″·10+ gal·peaceful
algae
hard

Turf Algae

Various genera

algaesaltwater

A dense mat of mixed short filamentous algae — the dominant algae type on wave-swept reef flats in nature. In captivity it traps detritus and is extremely difficult to manually remove. Sea urchins (Diadema, Tuxedo) and tangs are the most effective grazers. Consider a manual scraping plus herbivore-stocking approach.

fish
easy

Turquoise Danio

Danio kerri

fishfreshwater
2″·20+ gal·group 6+·peaceful
fish
expert

Turquoise Killifish

Nothobranchius furzeri

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

Turquoise Rainbowfish

Melanotaenia lacustris

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

Tuxedo Guppy

Poecilia reticulata

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

Tuxedo Platy

Xiphophorus maculatus

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

Twig Catfish

Farlowella acus

fishfreshwater
6″·30+ gal·peaceful
fish
medium

Two-Striped Lampeye

Chromaphyosemion bitaeniatum

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