The body of the Pygmy Beaked Whale is the rather typical spindle shape of the genus, although the tail is unusually thick.

• 秘鲁中喙鲸的体型与其他中喙鲸属喙鲸相近，呈纺锤状，身体横切面周长最大的区域在胸鳍与背鳍之间。