nudibranch

/noo-duh-brangk, nyoo-/US // ˈnu dəˌbræŋk, ˈnyu- //UK // (ˈnjuːdɪˌbræŋk) //

裸子植物,裸鳃动物,裸子鱼,裸子植物人

Definitions

n.名词 noun

1
- : a shell-less, marine snail of the suborder Nudibranchia, having external, often branched respiratory appendages on the back and sides.

Flat against the stone and not easily perceived may be a chiton, a planarian worm, or a nudibranch.
Ancylodoris, the only fresh-water Nudibranch, from Lake Baikal.
This is probably the commonest nudibranch upon the North Atlantic coast, and it occurs as frequently in European waters.
In Doris we find a quite different type of nudibranch from that presented by the two genera Dendronotus and olis.