Shoal & Stem

Species Catalogue

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

algae
medium

Coralline Algae

Corallinales spp.

algaesaltwater

Calcified encrusting algae that paints live rock, glass, and equipment in shades of pink, purple, and white — the hallmark of a mature, healthy reef. Requires stable calcium (400–450 ppm) and alkalinity (8–9 dKH). Does not need dedicated lighting but benefits from reef-level light. Spreads naturally from live rock and purchased plugs.

fish
medium

Corydoras Duplicareus

Corydoras duplicareus

fishfreshwater
2.2″·15+ gal·group 6+·peaceful
fish
medium

Cosby Gourami

Trichopodus trichopterus

fishfreshwater
4″·20+ gal·semi-aggr.
fish
medium

Court Jester Goby

Koumansetta rainfordi

fishsaltwater
2.8″·20+ gal·peaceful
shrimp
medium

Crown Shrimp

Caridina logemanni

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

Cryptocoryne Costata

Cryptocoryne costata

plantfreshwater
Foreground·Slow growth
plant
medium

Cryptocoryne Ferruginea

Cryptocoryne ferruginea

plantfreshwater
Midground·Slow growth
plant
medium

Cryptocoryne Hudoroi

Cryptocoryne hudoroi

plantfreshwater
Midground·Slow growth
plant
medium

Cryptocoryne Nurii

Cryptocoryne nurii

plantfreshwater
Foreground·Low to medium light·Slow growth
plant
medium

Cryptocoryne Pygmaea

Cryptocoryne pygmaea

plantfreshwater
Foreground·Slow growth
plant
medium

Cryptocoryne Scurrilis

Cryptocoryne scurrilis

plantfreshwater
Midground·Slow growth
plant
medium

Cryptocoryne Spiralis

Cryptocoryne spiralis

plantfreshwater
Background·Low to medium light·Slow growth
plant
medium

Cryptocoryne Usteriana

Cryptocoryne usteriana

plantfreshwater
Background·Low to medium light·Slow growth
fish
medium

Cylindricus Cichlid

Neolamprologus cylindricus

fishfreshwater
4″·20+ gal·semi-aggr.
plant
medium

Cyperus Helferi

Cyperus helferi

plantfreshwater
Medium to high light·Medium growth
fish
medium

Dageti Killifish

Epiplatys dageti

fishfreshwater
1.2″·10+ gal·peaceful
fish
medium

Darter Tetra

Characidium fasciatum

fishfreshwater
1.5″·15+ gal·group 6+·peaceful
fish
medium

Delhezi Bichir

Polypterus delhezi

fishfreshwater
14″·75+ gal·semi-aggr.
fish
medium

Denison Barb

Sahyadria denisonii

fishfreshwater
6″·55+ gal·group 6+·peaceful
fish
medium

Diamond Watchman Goby

Valenciennea puellaris

fishsaltwater
6″·30+ gal·peaceful
plant
medium

Didiplis Diandra

Didiplis diandra

plantfreshwater
Background·High light·Moderate growth
fish
medium

Disk Tetra

Myleus schomburgkii

fishfreshwater
12″·75+ gal·peaceful
fish
medium

Doctor Fish

Garra rufa

fishfreshwater
2.4″·20+ gal·group 6+·peaceful
fish
medium

Double Red Cockatoo Dwarf Cichlid

Apistogramma cacatuoides

fishfreshwater
3″·20+ gal·group 2+·semi-aggr.
fish
medium

Double Tail Betta

Betta splendens 'Double Tail'

fishfreshwater
2.5″·5+ gal·semi-aggr.
algae
medium

Dragon's Tongue

Halymenia sp.

algaesaltwater

Brilliant scarlet-red, blade-shaped macroalgae — one of the most visually striking species for display refugia. Provides excellent colour contrast and nutrient export. More delicate than Chaeto; requires moderate flow and consistent light. Popular with collectors and stunning under reef lighting.

fish
medium

Dwarf Anchor Catfish

Hara jerdoni

fishfreshwater
1.5″·10+ gal·group 3+·peaceful
plant
medium

Dwarf Hairgrass Mini

Eleocharis pusilla

plantfreshwater
Carpet·Medium to high light·Moderate growth
plant
medium

Echinodorus Kleiner Bar

Echinodorus Kleiner Bar

plantfreshwater
Midground·Medium growth
plant
medium

Echinodorus Oriental

Echinodorus Oriental

plantfreshwater
Midground·Medium growth
plant
medium

Echinodorus Vesuvius

Echinodorus Vesuvius

plantfreshwater
Midground·Medium growth
fish
medium

Egyptian Mouthbrooder

Pseudocrenilabrus multicolor

fishfreshwater
3″·20+ gal·peaceful
plant
medium

Elatine Hydropiper

Elatine hydropiper

plantfreshwater
Carpet·Moderate growth
fish
medium

Electric Blue Agassiz's Dwarf Cichlid

Apistogramma agassizii

fishfreshwater
3″·20+ gal·group 2+·semi-aggr.
invertebrate
medium

Electric Blue Crayfish

Procambarus alleni

invertebratefreshwater
5.5″·20+ gal·aggressive
fish
medium

Electric Blue Ram

Mikrogeophagus ramirezi

fishfreshwater
2.5″·20+ gal·group 2+·peaceful
13456716