Shoal & Stem

Species Catalogue

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

plant
beginner

Flame Moss

Taxiphyllum sp. 'Flame'

plantfreshwater

Flame Moss gets its name from the way its upright, twisted stems spiral and curve upward — resembling flickering orange flames when viewed in flowing water. Unlike most mosses that grow laterally, Flame Moss grows vertically, making it uniquely suited for mid-height mounding effects on rocks and wood. It is slow growing but compact, rarely requiring trimming, and stays tidy in low-flow areas.

plant
beginner

Flame Moss Mini

Taxiphyllum sp. 'Flame Mini'

plantfreshwater

Compact version of Flame Moss with shorter, denser upward-growing fronds. Creates a tighter 'flame' effect. Hardy and easy.

fish
beginner

Flame Tetra

Hyphessobrycon flammeus

fishfreshwater
1.6″·10+ gal·group 6+·peaceful
fish
beginner

Florida Flagfish

Jordanella floridae

fishfreshwater
2.5″·15+ gal·group 2+·semi-aggr.
shrimp
Hhard

Flowerhead Shrimp

Caridina logemanni

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

Flowerhorn Cichlid

Hybrid cichlid

fishfreshwater
12″·75+ gal·aggressive
fish
intermediate

Flying Fox

Epalzeorhynchos kalopterus

fishfreshwater
5.5″·55+ gal·semi-aggr.
plant
intermediate

Fontinalis Antipyretica

Fontinalis antipyretica

plantfreshwater

Willow Moss is a native cold-water aquatic moss with delicate, overlapping dark green leaves on branching stems. It prefers cooler water and good flow, making it excellent for coldwater and temperate setups with goldfish, temperate plants, or in nature biotopes. It attaches to rocks and wood and creates a natural, stream-like texture.

fish
beginner

Forktail Rainbowfish

Pseudomugil furcatus

fishfreshwater
2″·10+ gal·group 6+·peaceful
fish
beginner

Foxface Rabbitfish

Siganus vulpinus

fishsaltwater
9″·75+ gal·peaceful
fish
intermediate

French Angelfish

Pomacanthus paru

fishsaltwater
15″·180+ gal·semi-aggr.
fish
advanced

Freshwater Pipefish

Doryichthys martensii

fishfreshwater
7″·20+ gal·peaceful
fish
Xexpert

Freshwater Stingray

Potamotrygon motoro

fishfreshwater
20″·250+ gal·peaceful
coral
intermediate

Frogspawn Coral

Euphyllia divisa

coralsaltwater
2″·30+ gal·peaceful
fish
intermediate

Frontosa Cichlid

Cyphotilapia frontosa

fishfreshwater
14″·100+ gal·semi-aggr.
coral
intermediate

Fungia Plate Coral

Fungia spp.

coralsaltwater
2″·30+ gal·peaceful
fish
intermediate

Furcata Rainbowfish

Pseudomugil furcatus

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

Fuzz Algae

Stigeoclonium sp.

algaefreshwater

Short, fuzzy green tufts — typically 2–5 mm — that appear on the edges of plant leaves, hardscape, and equipment. One of the most common algae in newly planted tanks. Easily grazed by Amano shrimp, Otocinclus, and nerite snails. Caused by light excess or inconsistent CO₂ early in a tank's life. Usually resolves as the tank matures.

fish
intermediate

Fuzzy Dwarf Lionfish

Dendrochirus brachypterus

fishsaltwater
7″·50+ gal·semi-aggr.
coral
intermediate

Galaxea Coral

Galaxea fascicularis

coralsaltwater
2″·50+ gal·peaceful
fish
beginner

Galaxy Koi Betta

Betta splendens 'Galaxy Koi'

fishfreshwater
2.5″·5+ gal·semi-aggr.
shrimp
Hhard

Galaxy Pinto Shrimp

Caridina logemanni

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

Gardneri Killifish

Fundulopanchax gardneri

fishfreshwater
2.5″·10+ gal·group 2+·semi-aggr.
fish
advanced

German Blue Ram

Mikrogeophagus ramirezi

fishfreshwater
3″·20+ gal·group 2+·peaceful
shrimp
beginner

Ghost Shrimp

Palaemonetes paludosus

shrimpfreshwater
1.5″·5+ gal·group 3+·peaceful
plant
intermediate

Giant Ambulia

Limnophila aquatica

plantfreshwater

Lush, feathery stem plant with large whorls of finely divided leaves. Fast-growing background plant that creates a spectacular bushy effect. Needs good light and CO2.

plant
beginner

Giant Bacopa

Bacopa amplexicaulis

plantfreshwater

A larger Bacopa species with distinctive clasping (amplexicaul) leaves that wrap around the stem at the base. The blue-violet flowers it produces above the waterline are among the most attractive of any aquarium plant. Submerged leaves are broad and light green, giving it a lush, robust appearance. Grows quickly and is very adaptable — excellent as an emersed pond margin plant or fully submerged background plant.

fish
intermediate

Giant Betta

Betta splendens 'Giant'

fishfreshwater
5″·10+ gal·semi-aggr.
snail
Eeasy

Giant Colombian Ramshorn Snail

Marisa cornuarietis

snailfreshwater
1.5″·20+ gal·peaceful
fish
beginner

Giant Danio

Devario aequipinnatus

fishfreshwater
4″·30+ gal·group 6+·peaceful
fish
beginner

Giant Gourami

Osphronemus goramy

fishfreshwater
24″·200+ gal·semi-aggr.
plant
beginner

Giant Hairgrass

Eleocharis montevidensis

plantfreshwater

The tallest commonly kept Eleocharis species, producing stiff, dark green needle-like blades up to 30–50 cm (12–19.5 in) tall. Creates a dramatic, grass-like background that mimics riparian meadows. Unlike dwarf hairgrasses, it does not form a dense carpet but instead grows as individual clumps. Very undemanding and one of the few Eleocharis that thrives without CO₂ injection. Excellent for paludarium setups or tall tanks where vertical structure is desired.

snail
beginner

Giant Ramshorn Snail

Marisa cornuarietis

snailfreshwater
2″·10+ gal·peaceful
shrimp
Hhard

Giant River Prawn

Macrobrachium rosenbergii

shrimpfreshwater
8″·55+ gal·peaceful
plant
beginner

Giant Sagittaria

Sagittaria platyphylla

plantfreshwater

Tall Sagittaria with broad, strap-like leaves. Can reach 12+ inches. Easy background plant that propagates rapidly by runners.

plant
beginner

Giant Vallisneria

Vallisneria americana var. gigantea

plantfreshwater

Very large Vallisneria with broad, ribbon-like leaves that can reach the surface in deep tanks. Propagates by runners. Virtually indestructible.