Green Emerald Crab

The Green Emerald Crab is a popular marine invertebrate prized for its algae-eating abilities and striking emerald-green coloration. This reef-safe crab is highly effective at controlling hair algae and detritus, often seen climbing through live rock in search of food. Its compact size and peaceful behavior make it a valuable member of reef aquarium cleanup crews.

Care Facts:

Mithraculus sculptus

Tank Size: 10 gallons minimum

Temperature: 72–78°F (22–26°C)

Diet: Omnivore – feeds on algae, detritus, and will accept pellets and meaty foods

Behavior: Opportunistic, reef-safe scavenger

Max Size: Up to 2.5 inches

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