Phylum Protochordata, Subphylum Urichorta, Order Salpes, Family Salpacidae. The body is slipper-shaped and covered with a membrane, the front end being slightly wider than the rear, and the rear end has a pair of dark green tail-like projections. The body length is 12-15 cm, but larger ones can reach 20 cm. The tunic is thick and hard, and short spine-like projections are scattered on the dorsal surface. There are also 18-22 body muscles running parallel to each other in a circular pattern on the dorsal surface, which allow the fish to swim through the water by contracting them. It is found in warm waters around the world, and is food for fish. Source: Encyclopaedia Britannica Concise Encyclopedia About Encyclopaedia Britannica Concise Encyclopedia Information |
原索動物門尾索亜門サルパ綱断筋目サルパ科。体はスリッパ状で被膜におおわれており,前端は後部よりやや幅広く,後端には1対の暗緑色の尾状突起がある。体長は 12~15cmであるが,大きなものでは 20cmになる。被嚢は厚くて硬く,背面に短いとげ状の突起が散在する。背面にはまた 18~22個の体筋が環状に,互いに平行に走っており,これを収縮することによって水中を遊泳している。世界の温水域に分布し,魚類の餌となっている。
出典 ブリタニカ国際大百科事典 小項目事典ブリタニカ国際大百科事典 小項目事典について 情報 |
The Mongol army invaded Japan together with the Ji...
A breed of dog. Also known as the German Shepherd....
This is a scenic spot on the Kiso River in Agemat...
〘Noun〙 Buddhist term. A thousand Buddhas. A thousa...
...Thus, the Messager-Roaillot became the basis o...
From the 7th to the 8th century, Sogdian played a...
Year of death: 1927.2.1 (1927.2.1) Born: September...
…The culm is low, usually less than 2m, with only...
A rodent mammal of the Scyllidae family. It has fl...
...They are summarized in Table 1. There are also...
An independent administrative institution establis...
...The main industry is fishing, and it is the ba...
It is an epiphytic orchid native to the Himalayas,...
…A general term for a mammal of the rodent order,...
It is a field of study that applies analytical me...