Shoal & Stem

Species Catalogue

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

Halfmoon Bettabeginner

Halfmoon Betta

Betta splendens 'Halfmoon'

fishfreshwater
2.5″·5+ gal·semi-aggr.
Red Cherry Shrimpbeginner

Red Cherry Shrimp

Neocaridina davidi

shrimpfreshwater
1.2″·5+ gal·group 6+·peaceful
coral
beginner

Acan Lord

Acanthastrea lordhowensis

coralsaltwater
2″·30+ gal·peaceful
fish
advanced

Achilles Tang

Acanthurus achilles

fishsaltwater
9″·100+ gal·semi-aggr.
coral
Xexpert

Acropora

Acropora sp.

coralsaltwater
2″·75+ gal·peaceful
fish
intermediate

Adolfo's Corydoras

Corydoras adolfoi

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

Adonis Pleco

Acanthicus adonis

fishfreshwater
24″·150+ gal·peaceful
fish
intermediate

African Butterflyfish

Pantodon buchholzi

fishfreshwater
5″·30+ gal·semi-aggr.
plant
beginner

African Crinum

Crinum calamistratum

plantfreshwater

Striking background plant with long, narrow, wavy green leaves. Grows from a large bulb and can reach impressive heights. Very tolerant and long-lived. Low maintenance.

shrimp
Hhard

African Fan Shrimp

Desmocaris trispinosa

shrimpfreshwater
1.5″·20+ gal·group 3+·peaceful
fish
Mmedium

African Knife Fish

Xenomystus nigri

fishfreshwater
6″·55+ gal·semi-aggr.
plant
beginner

African Tiger Lotus

Nymphaea zenkeri

plantfreshwater

Stunning lily with red-spotted leaves. Grows from a bulb and alternates between broad, flat pads and long petioles reaching the surface. Remove surface leaves to keep it compact.

plant
intermediate

African Water Fern

Bolbitis heudelotii

plantfreshwater

Bolbitis heudelotii (African Water Fern) is a large, impressive aquatic fern from African rivers with deeply pinnate, translucent dark-green fronds that can reach 40–50 cm. Like Java Fern, the rhizome must be attached to hardscape and not buried. It thrives in moderate flow and benefits from soft water; hard, alkaline water stunts growth. Its bold, architectural texture makes it a dramatic midground to background accent plant.

fish
intermediate

Agassiz's Dwarf Cichlid

Apistogramma agassizii

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

Albino Angelfish

Pterophyllum scalare

fishfreshwater
6″·30+ gal·group 2+·semi-aggr.
fish
beginner

Albino Bristlenose Pleco

Ancistrus sp.

fishfreshwater
5″·20+ gal·peaceful
fish
beginner

Albino Corydoras

Corydoras aeneus

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

Albino Longfin Bristlenose Pleco

Ancistrus sp.

fishfreshwater
5″·20+ gal·peaceful
fish
intermediate

Albino Oscar

Astronotus ocellatus

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

Albino Rainbow Shark

Epalzeorhynchos frenatum

fishfreshwater
6″·55+ gal·semi-aggr.
fish
intermediate

Albino Tiger Barb

Puntigrus tetrazona

fishfreshwater
3″·20+ gal·group 6+·semi-aggr.
plant
Mmedium

Alternanthera Lilacina

Alternanthera lilacina

plantfreshwater

Alternanthera lilacina is a vibrant stem plant prized for its striking purple-to-lilac coloration on the undersides of its leaves, which intensifies under high light. It features narrow, lance-shaped leaves and a compact growth habit, making it ideal for creating colorful midground focal points in planted aquariums.

plant
intermediate

Alternanthera Reineckii

Alternanthera reineckii

plantfreshwater

A vibrant stem plant from South America prized for its deep red to purple undersides. It requires moderate to high light and CO2 injection to maintain its color and healthy growth. Often used as a midground accent plant in planted tanks.

plant
intermediate

Alternanthera Reineckii Mini

Alternanthera reineckii 'Mini'

plantfreshwater

Alternanthera reineckii 'Mini' is a compact cultivar of the classic red stem plant, producing smaller leaves and a more restrained growth habit that makes it more useful in nano tanks and detailed midground positions than the standard form. Its leaves display striking magenta-red to deep purple-red coloration on the undersides, creating vivid contrast against green plants. Iron supplementation and CO2 are key to maintaining intense colour.

plant
Hhard

Alternanthera Reineckii Pink

Alternanthera reineckii Pink

plantfreshwater

Alternanthera reineckii Pink is a vibrant stem plant prized for its striking pink to red coloration on the undersides of its leaves, which intensifies under high light. This medium-sized plant features narrow, lance-shaped leaves and a bushy growth habit, making it ideal for creating colorful midground focal points in planted aquariums.

plant
Hhard

Alternanthera Reineckii Purple

Alternanthera reineckii Purple

plantfreshwater

Alternanthera reineckii Purple is a vibrant stem plant prized for its deep purple to reddish coloration on the undersides of its narrow, lance-shaped leaves. This mid-ground plant exhibits striking color intensity under high lighting and CO2 supplementation, making it a popular choice for aquascapers seeking dramatic visual contrast. Its compact growth habit and vivid hues make it ideal for creating focal points in planted aquariums.

plant
intermediate

Alternanthera Reineckii Rosanervig

Alternanthera reineckii 'Rosanervig'

plantfreshwater

Rosanervig is a striking cultivar of Alternanthera with green upper leaf surfaces crossed by vivid pink-white veining, while the undersides remain deep red-pink. The contrasting vein pattern is unique in the aquatic plant world and makes it a focal accent in Dutch and Nature Aquarium layouts. Requires good light and CO2 for the best colour expression.

fish
advanced

Altum Angelfish

Pterophyllum altum

fishfreshwater
8″·55+ gal·group 2+·semi-aggr.
shrimp
beginner

Amano Shrimp

Caridina multidentata

shrimpfreshwater
2″·10+ gal·group 3+·peaceful
plant
beginner

Amazon Frogbit

Limnobium laevigatum

plantfreshwater

Amazon frogbit is a floating plant with round, slightly spongy leaves that provide excellent surface cover and diffuse lighting. Its dangling white roots absorb excess nutrients and provide refuge for fry and small shrimp. It grows rapidly in good light.

fish
beginner

Amazon Molly

Poecilia formosa

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

Amazon Sword

Echinodorus grisebachii

plantfreshwater

The amazon sword is a staple background plant in community aquariums, producing broad lanceolate leaves that provide shelter for fish. It is a heavy feeder that benefits greatly from root tab fertilisers. Given adequate nutrients and moderate light, it will grow large and produce runner plantlets.

fish
beginner

Ambiacus Corydoras

Corydoras ambiacus

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

Ammannia Gracilis

Ammannia gracilis

plantfreshwater

A beautiful stem plant that produces elongated, lance-shaped leaves with an olive-green to reddish-pink coloration. Under intense light and CO2 supplementation the leaves turn a rich red-orange, creating striking contrast with green plants. A staple in competition Dutch aquascapes.

plant
advanced

Ammannia Pedicellata

Ammannia pedicellata

plantfreshwater

Delicate golden-orange stem plant with narrow leaves. Distinctive warm colour. Needs good nutrition and CO2 to maintain colouration.

plant
intermediate

Ammannia Senegalensis

Ammannia senegalensis

plantfreshwater

Robust Ammannia with olive-green to reddish leaves. Easier than most Ammannia species. Good stepping stone to harder red plants.