Due to their fixed, boxy physique, how do boxfish propel themselves underwater?

Answer

By rapid fluttering of small fins (dorsal, anal, pectoral)

Because the body is rigidly encased, boxfish cannot use typical side-to-side body undulations; instead, they propel themselves using minute, rapid fluttering movements of their small dorsal, anal, and pectoral fins.

Due to their fixed, boxy physique, how do boxfish propel themselves underwater?

#Videos

Facts: The Boxfish - YouTube

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