在热带和温带的浅海水域中,有一类以共生著称的鱼,叫做潜鱼.潜鱼体长如鳗,尾部尖细,两眼隐于半透明的皮下,各鳍均不发达,腹鳍退化,肛门位于胸部,身体光滑无鳞,体长一般不超过30厘米.大多数潜鱼寄宿在海参、海星、珍珠贝、牡蛎、海鞘等海底无脊椎动物体内.有人观察到潜鱼找寻宿主的过 In the tropical and temperate shallow waters, there is a class of symbiotic fish known, known as the submerged fish. As long as the eel fish body length, tail tapering, hidden in the translucent subcutaneous two, each fin are not developed, pelvic fins degenerated, The anus is located in the chest, the body is smooth without scales, body length is generally not more than 30 cm .Most of the submerged fish in sea cucumber, starfish, pearl oysters, oysters, ascidians and other underwater invertebrates.It was observed submerged fish to find the host had