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Phylum Arthropoda > Subphylum Crustacea > Class Malacostraca > Order Decapoda > Brachyurans > Family Menippidae
Maroon stone crab
Menippe rumphii
Family Menippidae
updated Oct 2016

Where seen? This sturdy crab is sometimes among stones, coral rubble, rubbish and other hiding places. Elsewhere, it is found in sandy-muddy areas usually under rocks.

Features: Body width to about 9cm. Large oval body, edge smooth with four blunt points or 'teeth'. Between the eyes are four tiny bumps arranged in a square. Reddish to pinkish brown and maroon in adults; young crabs maroon to reddish brown, with longitudinal white stripes. Large pincers smooth (no pimples) with black tips. One pincer slightly larger with a large molar-like tooth at the base of the finger. Walking legs not very hairy. Its eyes are all red without any green, unlike
the very similar looking Stone crab (Myomenippe hardwickii).

Steady crab: When a stone is overturned, other crabs usually madly dash out helter skelter. The stone crab merely tucks its limbs under its body and remains motionless. In this way, predators overlook it as they focus instead on the more nervous crabs.

Sometimes mistaken for Red egg crabs (Atergatis integerrimus), especially Stone crabs that are rather reddish. Red egg crabs have a similar shaped body but their eyes are all red and they usually have white dots on their body, although some may be plain.
May also be confused with similar crabs in the same habitat. Here's more on how to tell apart big crabs with big pincers seen on the rocky shores and coral rubble.

Changi, Jun 08
Four tiny bumps in a square.
No green in the eyes.

Tanah Merah, Jun 12

Maroon stone crabs on Singapore shores

Photos of Maroon stone crabs for free download from wildsingapore flickr

Distribution in Singapore on this wildsingapore flickr map


Changi, Jun 16
Photo shared by Loh Kok Sheng on flickr.

Chek Jawa, Jul 15
Photo shared by Heng Pei Yan on her blog.


Punggol, Jun 11
Photo shared by Loh Kok Sheng on flickr.

East Coast Park, Jun 11
Photo shared by Loh Kok Sheng on flickr.

Links

References
www.flickr.com
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