English: Mud crab, colour. Scylla serrata (Forsskål, 1775). Grant's "Guide to Fishes" (1965) p.244 and p.224
Artwork by Frank Olsen
Also known as the mangrove crab or black crab, this species is found in the estuaries and mangroves of Africa, Australia and Asia. In their most common form, the shell colour varies from a deep, mottled green to very dark brown.
These crabs are highly cannibalistic in nature; when crabs undergo moulting, other hard, shelled ones sometimes attack the moulting crabs and devour them. The females can give birth to a million offspring which can grow up to 3.5 kg in size and have a shell width of up to 24 cm.
Description source:
Wikipedia
View the original image at the Queensland State Archives:
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