A small conical tube located just ahead of the anal fin and usually visible only during, or shortly before, spawning, through which gametes are expelled.

　
英 美
  • 一種小的錐形管正好位于臀鰭之前，通常只有在產(chǎn)卵的時(shí)候或之前一點(diǎn)會(huì )被看見(jiàn)，期間配子會(huì )被排出。
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