Shoal & Stem

Species Catalogue

1,492 species — care guides, community photos, water parameters, and tank-mate compatibility.

fish
medium

Butterfly Goodeid

Ameca splendens

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

Butterfly Hillstream Loach

Beaufortia kweichowensis

fishfreshwater
2.5″·30+ gal·group 3+·peaceful
fish
medium

Butterfly Pleco

Dekeyseria brachyura

fishfreshwater
6″·30+ gal·peaceful
plant
easy

Butterfly Salvinia

Salvinia auriculata

plantfreshwater
Floating·Fast growth
invertebrate
easy

CPO Crayfish

Cambarellus patzcuarensis

invertebratefreshwater
1.6″·10+ gal·peaceful
invertebrate
easy

Cajun Dwarf Crayfish

Cambarellus shufeldtii

invertebratefreshwater
1.4″·10+ gal·peaceful
fish
easy

Calico Platy

Xiphophorus maculatus

fishfreshwater
2.5″·10+ gal·group 5+·peaceful
fish
medium

Calvus Cichlid

Altolamprologus calvus

fishfreshwater
5″·30+ gal·semi-aggr.
shrimp
easy

Camel Shrimp

Rhynchocinetes durbanensis

shrimpsaltwater
2″·20+ gal·group 3+·peaceful
plant
medium

Cameroon Moss

Plagiochilaceae sp.

plantfreshwater
Epiphyte·Slow growth
fish
easy

Campoma Endler

Poecilia wingei

fishfreshwater
1.2″·5+ gal·group 3+·peaceful
fish
easy

Canary Blenny

Meiacanthus oualanensis

fishsaltwater
4.5″·30+ gal·peaceful
coral
easy

Candy Cane Coral

Caulastrea furcata

coralsaltwater
2″·30+ gal·peaceful
fish
easy

Cape Lopez Lyretail

Aphyosemion australe

fishfreshwater
2.5″·10+ gal·group 2+·semi-aggr.
shrimp
easy

Carbon Rili Shrimp

Neocaridina davidi

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

Cardinal Tetra

Paracheirodon axelrodi

fishfreshwater
2″·15+ gal·group 6+·peaceful
shrimp
medium

Caridina Babaulti

Caridina babaulti

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

Carpenter's Fairy Wrasse

Paracheilinus carpenteri

fishsaltwater
4″·55+ gal·peaceful
fish
medium

Caudopunctatus Cichlid

Neolamprologus caudopunctatus

fishfreshwater
3.5″·20+ gal·semi-aggr.
algae
easy

Caulerpa

Caulerpa prolifera

algaesaltwater

Fast-growing macroalgae with flat, oval blades on creeping runners. Excellent nutrient export and refugium algae. Can go 'sexual' under stress — turning milky white and releasing gametes, causing a tank crash. Keep under 24h light or harvest regularly to prevent this. Widely available and very effective.

fish
medium

Celebes Halfbeak

Nomorhamphus celebensis

fishfreshwater
2.5″·20+ gal·group 6+·peaceful
fish
medium

Celebes Rainbowfish

Marosatherina ladigesi

fishfreshwater
3″·20+ gal·group 6+·peaceful
fish
medium

Celestial Eye Goldfish

Carassius auratus

fishfreshwater
5″·20+ gal·group 2+·peaceful
fish
easy

Celestial Pearl Danio

Danio margaritatus

fishfreshwater
1″·10+ gal·group 8+·peaceful
plant
easy

Ceratophyllum Submersum

Ceratophyllum submersum

plantfreshwater
Floating·Low–High light·Very growth
snail
easy

Cerith Snail

Cerithium sp.

snailsaltwater
1″·10+ gal·peaceful
algae
easy

Chaetomorpha

Chaetomorpha linum

algaesaltwater

The most popular refugium algae in the reef hobby — tumbling masses of stiff, wire-like bright green strands. Grows rapidly, exporting nitrates and phosphates as it's harvested. Provides a habitat for copepods and amphipods that migrate into the display tank as live food. Extremely hardy.

coral
medium

Chalice Coral

Echinophyllia sp.

coralsaltwater
2″·30+ gal·peaceful
algae
medium

Chara (Stonewort)

Chara sp.

algaefreshwater

Not a true alga but a charophyte — an evolutionary stepping stone between algae and land plants. Whorled branches on brittle stems; produces a distinctive musky smell when crushed. Tolerates very hard, alkaline water that many plants cannot. Often kept deliberately in biotope setups for its unique look.

fish
hard

Checkerboard Cichlid

Dicrossus filamentosus

fishfreshwater
3″·20+ gal·group 2+·peaceful
fish
easy

Checkered Barb

Oliotius oligolepis

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

Cherub Angelfish

Centropyge argi

fishsaltwater
3″·30+ gal·semi-aggr.
fish
medium

Chili Rasbora

Boraras brigittae

fishfreshwater
0.8″·5+ gal·group 8+·peaceful
amphibian
medium

Chimera Axolotl

Ambystoma mexicanum

amphibianfreshwater
10″·20+ gal·peaceful
fish
medium

Chinese Algae Eater

Gyrinocheilus aymonieri

fishfreshwater
11″·55+ gal·semi-aggr.
fish
medium

Chinese High Fin Banded Shark

Myxocyprinus asiaticus

fishfreshwater
24″·125+ gal·peaceful