Shoal & Stem

Species Catalogue

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

fish
hard

Licorice Gourami

Parosphromenus deissneri

fishfreshwater
1.5″·10+ gal·peaceful
fish
hard

Lined Seahorse

Hippocampus erectus

fishsaltwater
6″·30+ gal·group 2+·peaceful
plant
hard

Ludwigia Cuba

Ludwigia inclinata var. verticillata 'Cuba'

plantfreshwater
Background·Fast growth
plant
hard

Ludwigia Pantanal

Ludwigia inclinata var. verticillata 'Pantanal'

plantfreshwater
Midground·Moderate growth
plant
hard

Ludwigia Senegalensis

Ludwigia senegalensis

plantfreshwater
Midground·Slow growth
plant
hard

Ludwigia White

Ludwigia palustris 'White'

plantfreshwater
Midground·Slow growth
algae
hard

Lyngbya

Lyngbya sp.

algaefreshwater

Dark, wiry filaments of cyanobacteria that form dense mats — often mistaken for BBA. Unlike true algae, it can fix atmospheric nitrogen, meaning low nitrogen levels do not suppress it. Produces toxins harmful to invertebrates. Requires the same treatment as blue-green algae: blackout, H₂O₂ treatment, and improved flow.

plant
hard

Madagascar Lace Plant

Aponogeton madagascariensis

plantfreshwater
Moderate growth
coral
hard

Montipora

Montipora sp.

coralsaltwater
2″·40+ gal·peaceful
fish
hard

Moorish Idol

Zanclus cornutus

fishsaltwater
9″·100+ gal·peaceful
shrimp
hard

Mosura Pinto Shrimp

Caridina logemanni

shrimpfreshwater
1.25″·10+ gal·group 10+·peaceful
shrimp
hard

Mosura Shrimp

Caridina logemanni

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

Mudskipper

Periophthalmus barbarus

fishbrackish
6″·30+ gal·semi-aggr.
plant
hard

Nesaea Golden

Nesaea pedicellata 'Golden'

plantfreshwater
Midground·Moderate growth
plant
hard

Ottelia Mesenterium

Ottelia mesenterium

plantfreshwater
Moderate growth
fish
hard

Pacu

Colossoma macropomum

fishfreshwater
42″·500+ gal·semi-aggr.
fish
hard

Peacock Bass

Cichla ocellaris

fishfreshwater
24″·200+ gal·aggressive
fish
hard

Pigeon Blood Discus

Symphysodon sp.

fishfreshwater
6″·55+ gal·group 4+·peaceful
fish
hard

Pike Cichlid

Crenicichla sp.

fishfreshwater
10″·55+ gal·aggressive
shrimp
hard

Pinto Shrimp

Caridina cantonensis var. 'Pinto'

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

Potter's Angelfish

Centropyge potteri

fishsaltwater
5″·55+ gal·semi-aggr.
fish
hard

Powder Blue Tang

Acanthurus leucosternon

fishsaltwater
9″·100+ gal·semi-aggr.
plant
hard

Purple Ludwigia

Ludwigia glandulosa

plantfreshwater
Midground
fish
hard

Queen Angelfish

Holacanthus ciliaris

fishsaltwater
18″·250+ gal·semi-aggr.
fish
hard

Red Devil Cichlid

Amphilophus labiatus

fishfreshwater
12″·75+ gal·aggressive
shrimp
hard

Red Galaxy Pinto Shrimp

Caridina logemanni

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

Red Tail Catfish

Phractocephalus hemioliopterus

fishfreshwater
48″·1000+ gal·aggressive
fish
hard

Red Turquoise Discus

Symphysodon sp.

fishfreshwater
6″·55+ gal·group 4+·peaceful
shrimp
hard

Rock Prawn

Macrobrachium lar

shrimpfreshwater
3.5″·20+ gal·aggressive
plant
hard

Rotala Bangladesh

Rotala sp.

plantfreshwater
Midground
plant
hard

Rotala Blood Red

Rotala sp.

plantfreshwater
Background·Very high light·Medium growth
plant
hard

Rotala Bossii

Rotala sp. 'Bossii'

plantfreshwater
Midground·Slow growth
plant
hard

Rotala Butterfly

Rotala sp. 'Butterfly'

plantfreshwater
Midground·Slow growth
plant
hard

Rotala Macrandra

Rotala macrandra

plantfreshwater
Background·Very high light·Moderate growth
plant
hard

Rotala Macrandra Mini

Rotala macrandra

plantfreshwater
Midground·High light·Medium growth
plant
hard

Rotala Macrandra Mini Red

Rotala macrandra Mini Red

plantfreshwater
Midground·Slow growth