Fish Species

Emerald Crab

Emerald Crab - Description

The Emerald Crab also known as the Green Crab or Emerald Mithrax Crab is a very useful addition to the community saltwater tank. They are fantastic cleaners and spend their time eating algae from the tank floor. They are a nocturnal and spend the day hiding in rock crevices, coming out at night to feed and clean!

Popular Name: Emerald Crab
Species: Mithrax sculptus

Profile of the Emerald Crab

This Profile contains interesting facts and information about the Emerald Crab species.

  • Size: Up to 5cm

  • Fish Tank conditions: PH 8.1 to 8.4

  • Diet / Feeding: Bubble Algae, Frozen, Dried or Flaked food

  • Temperament: Peaceful, Good Addition to community tank

  • Habitat: Rocky Sea Bed, Marine waters of Atlantic and Caribbean

  • Behaviour: Generally Peaceful but may fight with other crabs and shrimps

  • Range: Caribbean, Atlantic

Scientific Classification of the Emerald Crab

Definition: Scientific classification, or biological classification, is how biologists group and categorize species of organisms with shared physical characteristics. Scientific classification belongs to the science of taxonomy.

  • Species: Mithrax sculptus

  • Popular Name: Emerald Crab - Green Crab

  • Kingdom: Animalia

  • Phylum: Arthropoda

  • Class: Crustacea

  • Order: Decapoda

  • Family: Majidae


Crustaceans Index

Facts about Fish Species - Emerald Crab

The colours, shapes and sizes of individual fishes varies enormously - you really need excellent quality pictures or photographs to assist in the identification process.


A combination of the number of fins and their characteristics, color, scale counts, general features, maximum length and distribution are used during a species identification process.

The species detailed on this website are Tropical, Saltwater, Aquarium , Marine , Pet , Pond, Clown, Koi,
Beta (Betta), Gold Fish (Goldfish), Star, Angel, Puffer, Discus, Piranha, Rainbow, Parrot, Crustaceans, Sea Anemones and Coral.

For more information and pictures of the Emerald Crab visit the
Full Fish Species Website

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