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With a carapace of only about 2 centimetres or 0.8 inches in diameter, it has relatively long arms, which are thickly covered with fine hairs, red or reddish brown in colour, and often laden with small bits of debris for further camouflage. It is frequently, but not always, found in association with the bubble coral Plerogyra sinuosa.
Humann and DeLoach classify the orang-utan crab as "Oncinopus sp. 1" and assert it was "formerly classified" as Achaeus japonicus, though they describe their own genus identification as "tentative."
References[edit source | edit]
- Peter Davie (2010). "Achaeus japonicus". World Register of Marine Species. Retrieved February 20, 2012.
- T. Gosliner, D. Behrens & G. Williams (1996). Coral Reef Animals of the Indo-Pacific. p. 231.
- "Orang-utang crab (Achaeus japonicus)". Crabs of Japan. Marine Species Identification Portal. Retrieved February 19, 2012.
- Matteo Guardini & Massimo Boyer. "Orang-utan crab". World Database of Marine Species. Retrieved February 19, 2012.
- Paul Humann & Ned DeLoach (2010). Reef Creature Identification: Tropical Pacific. p. 223.