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Emerald Crab

Emerald Crab

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Mithraculus sculptus

Due to variations within
species, your item may not look identical to the image provided. Approximate
size range may also vary between individual specimen

Care Level: Easy

Temperament: Semi-aggressive

Color Form: Green


Reef Compatible: Yes

Water Conditions: 72-78?
F, dKH 8-12, pH 8.1-8.4, sg 1.023-1.025

Max. Size: 2?"

Origin: Caribbean

Family: Majidae

Supplements: Calcium,
Magnesium, Iodine, Trace Elements


The Emerald Crab is well respected for its scavenging
ability. It will enthusiastically feed on uneaten meaty foods and many types of
nuisance algae. Unlike many other animals, Mithraculus sculptus will eat bubble
algae and helps clean your aquarium of these algae. Its distinct, flat shiny
green body and hairy legs easily identify the Emerald Crab.

Native to the reefs of the Caribbean, the Emerald Crab is
nocturnal and hides in caves and amongst rubble during the day. In the home
aquarium, this member of the Majidae family requires a well-established
aquarium with plenty of rockwork and hiding places. Once familiar with its
surroundings, the Emerald Crab will venture out of hiding during the day to
forage on algae.


Care needs to be taken to ensure an ample supply of food
is available for the Emerald Crab. Many aquarists supplement the Emerald Crab's
diet with dried seaweed and chopped meaty foods, such as shrimp, as well as a
quality pellet fish food.


Otherwise, this opportunistic feeder may turn to corals,
invertebrates, or small fish for a food source. However, when well fed, most
Emerald Crabs are very tolerant of their tankmates and highly compatible in
reef environments. Like other invertebrates, the Emerald Crab does not tolerate
copper-based medications or fluctuating water parameters