Shoal & Stem

Species Catalogue

809 species matching your filters — care guides, community photos, water parameters, and tank-mate compatibility.

fish
easy

Redtail Goodeid

Xenotoca eiseni

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

Reticulatus Corydoras

Corydoras reticulatus

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

Rosanervig Hygrophila

Hygrophila polysperma

plantfreshwater
Background·Medium–high light
plant
easy

Rose Sword

Echinodorus sp. 'Rose'

plantfreshwater
Midground·Moderate growth
fish
easy

Rosy Barb

Pethia conchonius

fishfreshwater
3.5″·25+ gal·group 6+·semi-aggr.
fish
easy

Rosy Loach

Petruichthys sp. rosy

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

Rosy Red Minnow

Pimephales promelas

fishfreshwater
2.5″·10+ gal·group 6+·peaceful
fish
easy

Rosy Tetra

Hyphessobrycon rosaceus

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

Rotala Nanjenshan

Rotala nanjenshan

plantfreshwater
Background·Low–High light·Fast growth
plant
easy

Roundleaf Lindernia

Lindernia rotundifolia

plantfreshwater
Midground
fish
easy

Roundtail Paradisefish

Macropodus ocellatus

fishfreshwater
2.5″·10+ gal·semi-aggr.
fish
easy

Royal Gramma

Gramma loreto

fishsaltwater
3″·30+ gal·semi-aggr.
terrestrial
easy

Rubber Plant

Ficus elastica

terrestrialfreshwater
Bright indirect light·Moderate growth
snail
easy

Ruby Nerite Snail

Neritina variegata

snailfreshwater
0.75″·5+ gal·peaceful
fish
easy

Rusty Cichlid

Iodotropheus sprengerae

fishfreshwater
3.5″·20+ gal·peaceful
fish
easy

Ryukin Goldfish

Carassius auratus

fishfreshwater
8″·20+ gal·peaceful
fish
easy

Sailfin Molly

Poecilia latipinna

fishfreshwater
4″·30+ gal·group 3+·peaceful
shrimp
easy

Sakura Rili Shrimp

Neocaridina davidi

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

Sakura Shrimp

Neocaridina davidi

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

Salt & Pepper Platy

Xiphophorus maculatus

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

Samolus Valerandi

Samolus valerandi

plantfreshwater
Foreground·Slow growth
fish
easy

Schwartzi Corydoras

Corydoras schwartzi

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

Scissortail Dartfish

Ptereleotris evides

fishsaltwater
4″·30+ gal·group 2+·peaceful
fish
easy

Scissortail Rasbora

Rasbora trilineata

fishfreshwater
5″·30+ gal·group 8+·peaceful
fish
easy

Scopas Tang

Zebrasoma scopas

fishsaltwater
8″·75+ gal·semi-aggr.
shrimp
easy

Scud

Hyalella azteca

shrimpfreshwater
0.3″·2+ gal·peaceful
algae
easy

Sea Lettuce

Ulva lactuca

algaesaltwater

Bright green, tissue-thin sheets of macroalgae familiar on coastlines worldwide. Fast-growing nutrient exporter and a relished food for tangs, urchins, and rabbitfish. Tolerates a very wide temperature and salinity range. Can become weedy if not harvested — keep export-focused.

fish
easy

Serpae Tetra

Hyphessobrycon eques

fishfreshwater
1.75″·15+ gal·group 6+·semi-aggr.
fish
easy

Severum

Heros severus

fishfreshwater
8″·55+ gal·semi-aggr.
shrimp
easy

Sexy Shrimp

Thor amboinensis

shrimpsaltwater
1″·10+ gal·group 3+·peaceful
fish
easy

Shell Dweller Cichlid

Lamprologus ocellatus

fishfreshwater
2″·20+ gal·semi-aggr.
fish
easy

Shortfin Molly

Poecilia mexicana

fishfreshwater
3″·20+ gal·group 3+·peaceful