Coenobita spinosus(EN)

Image©Rob Kroenert

Common name

Hairy Land Hermit Crab, Forest Land Hermit Crab.


Shield length can reach 25mm.


Polynesia Islands, Northern Mariana Islands, Tuamotu, Vanuatu, Fiji, Samoa, Guam, Tonga, Japan(Ogasawara Islands) etc.


Live in wet and dark coastal forests or found in sandy beach.

Larval stages



Body colour is black, dark brown, red beans colour, dark purple, dark orange.

Shield is very convex.

Eyestalks are compressed in shape.

Antennal acicles are fused with the second segment of peduncle.

Left cheliped is bigger than right cheliped. No series of ridge (////) on upper outer surface of palm of left cheliped.

Upper margins of both cheliped with brush of setae.

Dactylus, palm and carpus of cheliped with hairy or corneous spines, especially on inner side of dactylus.

Walking legs 
Dactylus, propodus and carpus of 2nd and 3rd walking legs with hairy or corneous spines. 

Propodus of left 3rd walking legs is short, distal margin and lower margin toothed.

Dactylus, propodus of left 3rd walking leg is stronger than that of left 2nd walking leg.

Outer surface of propodus of left 3rd walking leg not separated from dorsal surface by a well-marked longitudinal crest(A).

The abdomen is short.

Male coxae of 5th legs 
Not strongly produced in males.

Please refer to this article


1. Do not know if it is because of lack shells, some individuals select fruit shells for shelter.

2. It seems that in the South Pacific Islands, Coenobita spinosus has usually been misidentified as Coenobita cavipes.


Reference links


Reference articles

  • Haig J., Ball E. E., 1988. Hermit crabs from north Australian and eastern Indonesian waters (Crustacea, Decapoda, Anomura, Paguroidea) collected during the 1975 Alpha Helix Expedition
  • Makoto Sasazuka., Katsuyuki Hamasaki., and Shigeki Dan., 2019. Shell utilization and shell-shedding behaviour by the land hermit crab Coenobita spinosus
  • McLaughlin P. A., Komai T., Lemaitre R., Rahayu D. L., 2010. Annotated checklist of anomuran decapod crustaceans of the world (exclusive of the Kiwaoidea and families Chirostylidae and Galatheidae of the Galatheoidea) Part I. Lithodoidea, Lomisoidea and Paguroidea
  • Poupin J., 1994. Quelques crustacés décapodes communs de Polynésie française
  • Poupin J., 1996. Crustacea Decapoda of French Polynesia (Astacidea, Palinuridea, Anomura, Brachyura)
  • Poupin J., Juncker M., 2010. A guide to the decapod crustaceans of the South Pacific
  • 朝倉彰, 2004. ヤドカリ類の分類学,最近の話題 - オカヤドカリ科
  • 笹塚諒, 浜崎活幸, 團重樹, 2019. オオトゲオカヤドカリの若齢個体 (Young individuals of the land hermit crab Coenobita spinosus (Decapoda: Anomura: Coenobitidae))
  • 豊田幸詞, 関慎太郎, 2014. 日本の淡水性エビ.カニ: 日本産淡水性・汽水性甲殻類102種(ネイチャーウォッチングガイドブック), 誠文堂新光社
  • 佐々木哲朗, 飴田洋祐, 堀越宙, 後藤雅文, 2021. 北硫黄島におけるオカヤドカリ類および陸生カニ類 (Land crabs of Kita-iwoto Island)

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