Thanks to specialized breathing abilities, mudskippers can spend a lot of time on land. When under threat, a male will defend his burrow by hopping, gaping and giving his foe the "middle fin."
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From @sheelkn
Thanks to specialized breathing abilities, mudskippers can spend a lot of time on land. When under threat, a male will defend his burrow by hopping, gaping and giving his foe the "middle fin."