cryptostomy

(biology) An adaptation in which the mouth is reduced to a slit and its location is concealed.

Japanese Meaning

（生物学）口が細い裂け目に縮小され、その位置が隠される特異な適応現象。

Some deep-sea fish have evolved cryptostomy to avoid detection by predators.

一部の深海魚は捕食者に見つかりにくくするために、口が裂け目のように小さくなり位置が隠れる適応を進化させた。

Sense（1）

(biology) An adaptation in which the mouth is reduced to a slit and its location is concealed.