Spongicola venusta (Spongicola venusta)

Japanese: ドウケツエビ(同穴蝦) - ドウケツエビ（英語表記）Spongicola venusta

A shrimp of the family Coccidae in the class Crustacea that lives in the body cavity of the hexactinellid sponges. It is about 3 cm long, with the females being larger. The carapace is soft, smooth, and white and translucent. The rostrum is slightly shorter than half the length of the cephalothorax, with 8 to 10 spines on the upper edge and 3 to 4 spines near the tip of the lower edge. The first three pairs of thoracic legs form a pair of pincers, with the third pair being particularly large. Coccida sponges have bone fragments arranged in a lattice pattern, and the inside is like a hollow cage. The Coccidae that live here usually come in pairs, male and female, and are thought to enter the sponge as planktonic larvae or immediately after metamorphosing into juvenile shrimp, and spend their entire lives there.

Source: Heibonsha World Encyclopedia, 2nd Edition Information

Japanese:

六放海綿類のカイロウドウケツカイメン類の体腔中にすむ甲殻綱ドウケツエビ科のエビ。体長3cm内外で，雌のほうが大きい。甲は軟らかく，滑らかで，白色半透明。額角は頭胸甲の1/2よりやや短く，上縁に8～10本，下縁の先端近くに3～4本のとげがある。前3対の胸脚がはさみになっているが，第3胸脚がとくに大きい。カイロウドウケツカイメン類は骨片が格子状に配列し，内部が中空の籠状である。ここにすみついているドウケツエビはふつう雌雄1対で，浮遊生活をする幼生の時期あるいは稚エビに変態直後にカイメン中に入り，そのまま一生を送るものと考えられる。

出典　株式会社平凡社世界大百科事典第２版について　情報

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