Shoal & Stem

Species Catalogue

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

fish
intermediate

Threadfin Acara

Acarichthys heckelii

fishfreshwater
8″·55+ gal·peaceful
fish
intermediate

Threadfin Rainbowfish

Iriatherina werneri

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

Three-lined Pencilfish

Nannostomus trifasciatus

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

Three-stripe Damsel

Dascyllus aruanus

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

Three-stripe Dwarf Cichlid

Apistogramma trifasciata

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

Tibee Shrimp

Caridina sp. (Tibee)

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

Tiger Barb

Puntigrus tetrazona

fishfreshwater
3″·20+ gal·group 6+·semi-aggr.
plant
beginner

Tiger Lotus

Nymphaea zenkeri

plant

The Tiger Lotus is a bulb plant with striking, broadly ovate leaves that are green or red, patterned with dark maroon spots. Without pruning it quickly sends large lily pads to the surface; regular removal of floating leaves keeps the submerged growth dense and compact. A dramatic, high-impact focal plant for mid-tanks.

snail
beginner

Tiger Nerite Snail

Vittina semiconica

snailfreshwater
1″·5+ gal·peaceful
fish
intermediate

Tiger Oscar

Astronotus ocellatus

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

Tiger Shrimp

Caridina mariae

shrimpfreshwater
1.2″·5+ gal·group 6+·peaceful
fish
intermediate

Tinfoil Barb

Barbonymus schwanenfeldii

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

Tire Track Eel

Mastacembelus favus

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

Toadstool Coral

Sarcophyton trocheliophorum

coralsaltwater
2″·50+ gal·peaceful
fish
beginner

Tomato Clownfish

Amphiprion frenatus

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

Tonina Belem

Tonina sp. 'Belem'

plantfreshwater

Star-shaped whorled leaves create a unique visual. Needs very soft, acidic water and CO2. A true challenge plant for experienced hobbyists.

plant
advanced

Tonina Fluviatilis

Tonina fluviatilis

plantfreshwater

An exotic stem plant from the Amazon that produces tight spirals of fine, needle-like leaves arranged around the stem. It is challenging to keep, demanding very soft, acidic water and strong CO2 supplementation — conditions that mimic its blackwater origins. A showpiece plant in specialist Amazonian biotope and high-tech scapes.

plant
Xexpert

Tonina Lotus Blossom

Tonina fluviatilis Lotus Blossom

plantfreshwater

Tonina Lotus Blossom is a stunning stem plant prized for its delicate, feathery foliage and vibrant coloration that ranges from green to deep red depending on light and nutrient availability. This variety exhibits a compact, bushy growth habit with intricate leaf patterns resembling lotus petals, making it a striking focal point in the midground to background. It is one of the most demanding aquatic plants and requires expert-level care to thrive.

coral
intermediate

Torch Coral

Euphyllia glabrescens

coralsaltwater
2″·30+ gal·peaceful
fish
Mmedium

Torpedo Dwarf Cichlid

Taeniacara candidi

fishfreshwater
2.5″·20+ gal·peaceful
plant
Eeasy

Trident Java Fern

Microsorum pteropus Trident

plantfreshwater

Trident Java Fern is a distinctive variant of the classic Java Fern, featuring deeply lobed, trident-shaped fronds that create an intricate, feathery appearance. This slow-growing epiphytic fern adds elegant texture and visual interest to midground and background areas. It is extremely hardy and requires no special care, making it ideal for beginners and established aquariums alike.

fish
intermediate

Trifasciata Dwarf Cichlid

Apistogramma trifasciata

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

Trochus Snail

Trochus sp.

snailsaltwater
2″·10+ gal·peaceful
fish
advanced

Tropheus

Tropheus moorii

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

True Percula Clownfish

Amphiprion percula

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

Tukano Corydoras

Corydoras tukano

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

Turbo Snail

Turbo fluctuosus

snailsaltwater
2″·10+ gal·peaceful
algae
advanced

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
beginner

Turquoise Danio

Danio kerri

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

Turquoise Killifish

Nothobranchius furzeri

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

Turquoise Rainbowfish

Melanotaenia lacustris

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

Tuxedo Guppy

Poecilia reticulata

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

Tuxedo Platy

Xiphophorus maculatus

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

Tuxedo Swordtail

Xiphophorus hellerii

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

Twig Catfish

Farlowella acus

fishfreshwater
6″·30+ gal·peaceful
fish
Mmedium

Two-Striped Lampeye

Chromaphyosemion bitaeniatum

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