Mithraculus sculptus
Source: Kasper Hareskov Tygesen
Mithraculus sculptus
Source: Kasper Hareskov Tygesen

Facts

Latin name Mithraculus sculptus
Common name Emerald/Mithrax Crab
Family Majoidea - Mithraculus
Origin West Atlantic
Max length 4 cm (1.6")

As aquarium fish

Minimum volume 50 l (13 gal)
Hardiness Hardy
Suitable for aquarium Suitable for most aquarium
Reef safe Always reef safe
Aggressiveness Peaceful

Food

Mostly
  • Detritus
Recommended
  • Microalgea (Eg. spirulina)
  • Macroalgea (Eg. seaweed / nori)

Reef safe, when well fed

This species can be found nibbling soft coral and LPS if there is insufficient food available.

Effective algae-eaters

This species can eat large amounts of algae (relative to their size) from rocks, like green hair algae and filamentous algae.

As it doesn’t eat every algae type, in case of a specific algae plague, find out more precise information.

Family description (Majoidea)

Most crabs are not wanted in coral aquaria, although there are a few which are either fun or useful.

References and further reading

About references

James W. Fatherree. 2010. Aquarium Invertebrates: Crabs in the Marine Aquarium - Advanced Aquarist - (English)
Ronald L. Shimek. 2004. Marine Invertebrates (PocketExpert Guide) - TFH Publications / Microcosm Ltd. - (English)
Bob Fenner. Crabs For Marine Aquariums? Part 1, Part 2, Part 3 - Wet Web Media - (English)

Tags

algae eater
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