Oral arm

An Oral arm is an anatomical structure of "true" sea jellies (or Scyphozoans), which belong to the class Scyphozoa. Oral arms characterize Semaeostomeae, an order of large jellyfish.

The oral arms (of which there are usually four) are located around the mouth and hold the stinging cells, or cnidocysts, which are used to inject potential prey (or potential predators) with venom.

单词	Oral arm
释义	Oral arm 原声例句少儿畅学课堂 Depending on the species of jellyfish, they may also have frilly oral arms or long tentacles. 根据水母的品种，它们也可能会有褶边的口器，或长触须。英语百科 Oral arm An Oral arm is an anatomical structure of "true" sea jellies (or Scyphozoans), which belong to the class Scyphozoa. Oral arms characterize Semaeostomeae, an order of large jellyfish. The oral arms (of which there are usually four) are located around the mouth and hold the stinging cells, or cnidocysts, which are used to inject potential prey (or potential predators) with venom.
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