Shoal & Stem

Species Catalogue

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

shrimp
Mmedium

Eye Spot Pinto Shrimp

Caridina logemanni

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

Fahaka Puffer

Tetraodon lineatus

fishfreshwater
18″·125+ gal·aggressive
plant
beginner

Fairy Moss

Azolla filiculoides

plantfreshwater

Tiny floating fern that turns red in bright light. Creates a dense mat on the surface. Excellent nitrogen fixer. Can be invasive if not managed.

fish
beginner

False Julii Corydoras

Corydoras trilineatus

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

False Rummy Nose Tetra

Petitella georgiae

fishfreshwater
2″·15+ gal·group 8+·peaceful
fish
intermediate

Fancy Goldfish

Carassius auratus (fancy varieties)

fishfreshwater
8″·30+ gal·group 2+·peaceful
fish
beginner

Fancy Guppy

Poecilia reticulata

fishfreshwater
2″·10+ gal·group 3+·peaceful
shrimp
Mmedium

Fancy Tiger Pinto Shrimp

Caridina logemanni

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

Fantail Goldfish

Carassius auratus

fishfreshwater
7″·20+ gal·peaceful
fish
intermediate

Farlowella Catfish

Farlowella acus

fishfreshwater
6″·25+ gal·peaceful
coral
beginner

Favia Coral

Favia speciosa

coralsaltwater
2″·30+ gal·peaceful
coral
intermediate

Favites Brain Coral

Favites spp.

coralsaltwater
2″·50+ gal·peaceful
algae
beginner

Feather Caulerpa

Caulerpa sertularioides

algaesaltwater

Feathery, fern-like fronds on creeping runners — arguably the most attractive Caulerpa species. Works well in display refugia where its ornamental appearance is on show. Fast-growing nutrient exporter. Same caveats as other Caulerpa: harvest regularly to prevent sexual reproduction.

plant
Xexpert

Feather Duster Eriocaulon

Eriocaulon sp. 'Feather Duster'

plantfreshwater

Rare and highly sought-after Eriocaulon with long, feathery white-green leaves that fan out like a plume. A collector's plant demanding very soft, slightly acidic water and strong light. Breathtaking when healthy.

fish
beginner

Feathertail Betta

Betta splendens

fishfreshwater
3″·5+ gal·semi-aggr.
crab
Mmedium

Fiddler Crab

Uca pugnax

crabbrackish
2″·20+ gal·group 3+·semi-aggr.
snail
beginner

Fighting Conch

Strombus alatus

snailsaltwater
3″·30+ gal·peaceful
fish
intermediate

Figure Eight Puffer

Dichotomyctere ocellatus

fishbrackish
3″·20+ gal·aggressive
fish
beginner

Filament Barb

Dawkinsia filamentosa

fishfreshwater
5″·30+ gal·group 6+·peaceful
plant
intermediate

Fine-leaved Pondweed

Potamogeton gayi

plantfreshwater

Elegant plant with very fine, grass-like submerged leaves. Creates a soft, wispy texture perfect for natural-style aquascapes. Tolerates cool water well and can be used in temperate tanks.

coral
intermediate

Fire Coral

Millepora alcicornis

coralsaltwater
2″·30+ gal·peaceful
fish
advanced

Fire Eel

Mastacembelus erythrotaenia

fishfreshwater
36″·80+ gal·semi-aggr.
fish
intermediate

Fire Rasbora

Rasboroides vaterifloris

fishfreshwater
1.5″·15+ gal·group 8+·peaceful
shrimp
Eeasy

Fire Red Shrimp

Neocaridina davidi

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

Fire Shrimp

Lysmata debelius

shrimpsaltwater
2″·20+ gal·peaceful
fish
beginner

Firefish Goby

Nemateleotris magnifica

fishsaltwater
3″·20+ gal·group 2+·peaceful
fish
intermediate

Firemouth Cichlid

Thorichthys meeki

fishfreshwater
6″·30+ gal·semi-aggr.
plant
intermediate

Fissidens Fontanus

Fissidens fontanus

plantfreshwater

A flat, feather-like aquatic moss with a unique branching structure that differentiates it from round-leaved mosses like Java Moss. It attaches readily to rock and wood and grows as a distinctive carpet of interlocking fronds. Slower growing than Java Moss, it produces a tidier, more formal appearance and is popular in Nature Aquarium and Iwagumi layouts.

plant
advanced

Fissidens Nobilis

Fissidens nobilis

plantfreshwater

Premium aquatic moss with large, firm fronds resembling tiny ferns. Grows slowly but produces a striking, almost sculptural texture unlike any other moss. Attach to rock or wood; requires high flow and clean water.

fish
beginner

Five-Banded Barb

Desmopuntius pentazona

fishfreshwater
2″·15+ gal·group 6+·peaceful
fish
intermediate

Flag Tail Prochilodus

Semaprochilodus taeniurus

fishfreshwater
12″·125+ gal·semi-aggr.
fish
Eeasy

Flag Tetra

Hyphessobrycon heterorhabdus

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

Flagtail Corydoras

Corydoras robineae

fishfreshwater
2″·15+ gal·group 6+·peaceful
fish
intermediate

Flame Angelfish

Centropyge loricula

fishsaltwater
4″·70+ gal·semi-aggr.
fish
intermediate

Flame Dwarf Gourami

Trichogaster lalius

fishfreshwater
3.5″·15+ gal·semi-aggr.
fish
beginner

Flame Hawkfish

Neocirrhites armatus

fishsaltwater
3.5″·30+ gal·semi-aggr.