Some Fish Check Their Size vs Their Opponent in the Mirror Before a Fight

Some Fish Check Their Size vs Their Opponent in the Mirror Before a Fight

By Jess Thomson

Source: the news tribune

9/11/2024

Credit: Osaka Metropolitan University

Before squaring up for a fight, some fish check themselves out in the mirror to make sure they're big enough. This strange behavior was seen in bluestreak cleaner wrasse (Labroides dimidiatus), who examined their own body size in the mirror before deciding whether or not to attack another fish that was larger or smaller than themselves, according to a new paper in the journal Scientific Reports.

These findings may mark the first time that mental body image has been seen in non humans, the researchers say.

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