A shrimp belonging to the order Decapoda, class Crustacea, family Palaemonidae. It can reach a body length of 5 cm. It is often found in tide pools on rocky reefs, and is widely distributed along the coast of the Boso Peninsula, Hawaii, and various parts of Southeast Asia. Its body is almost transparent, with complex black-brown stripes, but in young individuals, the stripes are simple. Its rostrum is almost equal to the length of its cephalothorax, with its anterior half curved slightly upwards. It has 6-11 teeth on the upper edge (3 on the cephalothorax) and 2-6 on the lower edge. It is also commonly seen with its closely related species P. serrifer and P. ortmanni , but they can be distinguished by the length of its rostrum and the number of teeth. All are used for food and as fishing bait. [Masamichi Takeda] Its transparent body and complex horizontal stripes camouflage it from predators. © Underwater Fort Enterprise, Isamu Soyama "> Isosuji shrimp (ecology) They are most commonly found in shallow areas of rocky shorelines. The photo shows them feeding on dead small fish. © Underwater Fort Enterprise, Isamu Soyama "> Isosuji shrimp (ecology) Source: Shogakukan Encyclopedia Nipponica About Encyclopedia Nipponica Information | Legend |
節足動物門甲殻綱十脚(じっきゃく)目テナガエビ科に属するエビ。体長5センチメートルに達する。岩礁の潮だまりに多く、房総半島沿岸およびハワイ、東南アジア各地に広く分布する。体色はほとんど透明で、黒褐色の複雑な縞(しま)模様があるが、若い個体では単純である。額角(がっかく)は頭胸甲長にほぼ等しく、前半部がやや上方に曲がっている。歯数は上縁に6~11個(頭胸甲上に3個)、下縁に2~6個である。近縁種のスジエビモドキP. serriferやアシナガスジエビP. ortmanniも多くみられるが、額角の長さや歯数の相違によって識別される。いずれも食用や釣りの餌(えさ)とされる。 [武田正倫] 透明な体色と複雑な横縞で外敵からカムフラージュされる©水中フォート・エンタープライズ 楚山いさむ"> イソスジエビ(生態) 磯の浅所にもっとも普通にみられる。写真は死んだ小魚を捕食しているようす©水中フォート・エンタープライズ 楚山いさむ"> イソスジエビ(生態) 出典 小学館 日本大百科全書(ニッポニカ)日本大百科全書(ニッポニカ)について 情報 | 凡例 |
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