Shoal & Stem

Species Catalogue

1,570 species — care guides, community photos, water parameters, and tank-mate compatibility.

snail
easy

Red Ramshorn Snail

Planorbarius corneus

snailfreshwater
0.75″·5+ gal·peaceful
shrimp
easy

Red Rili Shrimp

Neocaridina davidi

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

Red Ruby Shrimp

Caridina logemanni

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

Red Spot Nerite Snail

Clithon diadema

snailfreshwater
0.75″·5+ gal·peaceful
invertebrate
easy

Red Swamp Crayfish

Procambarus clarkii

invertebratefreshwater
5.5″·20+ gal·aggressive
fish
hard

Red Tail Catfish

Phractocephalus hemioliopterus

fishfreshwater
48″·1000+ gal·aggressive
shrimp
medium

Red Tibee Shrimp

Caridina sp. (Tibee)

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

Red Turquoise Discus

Symphysodon sp.

fishfreshwater
6″·55+ gal·group 4+·peaceful
fish
easy

Red Wag Platy

Xiphophorus maculatus

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

Red Wagtail Platy

Xiphophorus maculatus

fishfreshwater
2.5″·10+ gal·group 5+·peaceful
shrimp
medium

Red Wine Shrimp

Caridina logemanni

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

Red Zebra Cichlid

Maylandia estherae

fishfreshwater
5.5″·55+ gal·aggressive
fish
medium

Red-Bellied Piranha

Pygocentrus nattereri

fishfreshwater
13″·100+ gal·group 5+·aggressive
fish
medium

Red-Striped Killifish

Aphyosemion striatum

fishfreshwater
1.5″·10+ gal·peaceful
fish
medium

Red-Tailed Black Shark

Epalzeorhynchos bicolor

fishfreshwater
5″·55+ gal·semi-aggr.
fish
easy

Red-Tailed Rasbora

Rasbora borapetensis

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

Redbreast Acara

Laetacara dorsigera

fishfreshwater
2.5″·20+ gal·peaceful
fish
easy

Redline Dwarf Rasbora

Microrasbora rubescens

fishfreshwater
1″·10+ gal·group 6+·peaceful
fish
easy

Redline Rasbora

Rasbora pauciperforata

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

Redtail Botia

Yasuhikotakia modesta

fishfreshwater
5″·75+ gal·group 3+·semi-aggr.
fish
easy

Redtail Goodeid

Xenotoca eiseni

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

Regal Angelfish

Pygoplites diacanthus

fishsaltwater
10″·100+ gal·semi-aggr.
fish
easy

Reticulatus Corydoras

Corydoras reticulatus

fishfreshwater
2″·15+ gal·group 6+·peaceful
terrestrial
moderate

Rex Begonia

Begonia rex

terrestrialfreshwater
Bright indirect light·Moderate growth
shrimp
medium

Rhino Shrimp

Caridina serratirostris

shrimpfreshwater
1.5″·10+ gal·group 8+·peaceful
algae
medium

Rhizoclonium

Rhizoclonium sp.

algaefreshwater

Thin, cotton-like green threads that form loose, easily detached clumps — often confused with hair algae but coarser and more tangled. Tends to form clumps rather than sheets. Usually caused by excess ammonia or organics in new tanks. Amano shrimp and Florida Flagfish handle it well.

coral
easy

Ricordea Florida

Ricordea florida

coralsaltwater
2″·30+ gal·peaceful
coral
easy

Ricordea Yuma

Ricordea yuma

coralsaltwater
2″·30+ gal·peaceful
shrimp
easy

Rili Red Sakura Shrimp

Neocaridina davidi

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

Rili Shrimp

Neocaridina davidi var. Rili

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

River Buttercup

Ranunculus inundatus

plantfreshwater
Foreground
shrimp
hard

Rock Prawn

Macrobrachium lar

shrimpfreshwater
3.5″·20+ gal·aggressive
fish
medium

Rope Fish

Erpetoichthys calabaricus

fishfreshwater
15″·55+ gal·peaceful
plant
easy

Rosanervig Hygrophila

Hygrophila polysperma

plantfreshwater
Background·Medium–high light
plant
medium

Rose Moss

Taxiphyllum sp. 'Rose'

plantfreshwater
Epiphyte·Very growth
plant
easy

Rose Sword

Echinodorus sp. 'Rose'

plantfreshwater
Midground·Moderate growth