Coenobita purpureus Japanese name: ムラサキオカヤドカリChinese name: 紫陸寄居蟹English name: Blueberry Hermit CrabOrigin: Japan, Taiwan The Blueberry Hermit Crab was once considered endemic to Japan but has recently been discovered in Taiwan as well. Juveniles are pale gray and difficult to distinguish from other land hermit crab species. However, adults develop a striking purple coloration, which unfortunately… Continue reading Blueberry Hermit Crab
Category: Other invertebrates
Okinawa Geothelphusa Freshwater Crab
Geothelphusa grandiovata Japanese name: オキナワオオサワガニChinese name: 巨圓澤蟹English name: Okinawa Geothelphusa Freshwater CrabOrigin: Endemic to Okinawajima Geothelphusa grandiovata is the largest species of Geothelphusa freshwater crabs found in Japan. Its carapace is smooth and glossy, and coloration varies widely from reddish brown to yellowish brown and purplish brown. The species name grandiovata is a combination of “grandis”… Continue reading Okinawa Geothelphusa Freshwater Crab
Satsuma eucosmia
Satsuma eucosmia eucosmia Japanese name: オキナワヤマタカマイマイ (ヤンバルヤマタカマイマイ)Chinese name: 沖繩高腰蝸牛English name: Satsuma eucosmiaOrigin: Okinawa Islands (Okinawajima, Iejima, Sesokojima, Tsukenjima, etc.). A different subspecies is found on Okinoerabujima in Kagoshima Prefecture. Among the arboreal species of the genus Satsuma distributed in the Okinawa Islands, the following are relatively common on Okinawajima: Satsuma eucosmia shows significant color variation.… Continue reading Satsuma eucosmia
Okinawa Candidiopotamon Freshwater Crab
Candidiopotamon okinawense Japanese name: オキナワミナミザワガニChinese name: 沖繩明溪蟹English name: Okinawa Candidiopotamon Freshwater CrabOrigin: Endemic to Okinawajima The genus Candidiopotamon is found only in Taiwan and parts of the Central Ryukyus. Five species are currently known, three in Okinawa Prefecture and two in Taiwan: Candidiopotamon okinawense, the species found on Okinawajima, is known for its aggressive behavior.… Continue reading Okinawa Candidiopotamon Freshwater Crab
Halcyon Giant Centipede
Scolopendra alcyona Japanese name: リュウジンオオムカデChinese name: 琉神蜈蚣、青龍蜈蚣（TW）English name: Halcyon Giant CentipedeOrigin: Northern Okinawajima, Ishigakijima, Iriomotejima, Kumejima, Tokashikijima, Taiwan This species was described as new in April 2021 ( Reference ), and it is the third known amphibious centipede species in the world. It inhabits stream environments and is known to dive into the water when… Continue reading Halcyon Giant Centipede
Kumejima Geothelphusa Freshwater Crab
Geothelphusa kumejima Japanese name: クメジマオオサワガニChinese name: 久米澤蟹English name: Kumejima Geothelphusa Freshwater CrabOrigin: Kumejima Geothelphusa kumejima is a freshwater crab endemic to Kumejima. Its body color often shows a purplish tint.
Aramoto Freshwater Crab
Geothelphusa aramotoi Japanese name: アラモトサワガニChinese name: 新本澤蟹English name: Aramoto Freshwater CrabOrigin: Okinawajima, Iheyajima Geothelphusa aramotoi is a freshwater crab with a carapace width of about 3 cm and has the most limited distribution among the species found on Okinawajima. It is restricted to specific mountain stream basins. Unlike other freshwater crabs that may leave the… Continue reading Aramoto Freshwater Crab
Kumejima Candidiopotamon Freshwater Crab
Candidiopotamon kumejimense Japanese name: クメジマミナミサワガニChinese name: 久米明溪蟹English name: Kumejima Candidiopotamon Freshwater CrabOrigin: Kumejima (endemic) This species is endemic to Kumejima. Compared to Geothelphusa kumejima, it has coarse wrinkles and protuberances on the surface of its carapace, making it easy to distinguish by appearance. The genus Candidiopotamon is distributed only in Taiwan and some of the… Continue reading Kumejima Candidiopotamon Freshwater Crab
Pacific Land Crab
Tuerkayana hirtipes Japanese Name: オカガニChinese Name: 毛足圓盤蟹English Name: Pacific land crabOrigin: Widely distributed throughout the tropical Indo-Pacific region The Pacific Land Crab (Tuerkayana hirtipes) has a dark carapace, ranging from dark brown to black. Its eyes are also black, and the hairy area on its cheeks is rectangular in shape. It mainly inhabits inland coastal… Continue reading Pacific Land Crab
Himeyuri Freshwater Crab
Geothelphusa tenuimanus Japanese name: ヒメユリサワガニChinese name: 細掌澤蟹English name: Himeyuri Freshwater CrabOrigin: Endemic to Okinawajima The Himeyuri Freshwater Crab is a relatively small species with a carapace width of about 3 cm. It is characterized by extremely slender walking legs and a body color that is usually tinged with purplish-red. It inhabits limestone areas on Okinawajima,… Continue reading Himeyuri Freshwater Crab