北海角魚(Prionotus carolinus)有像腿狀的鰭,會用來在海底爬行。最近一項研究發現,牠們可以用這些「腿」來品嚐食物!北海角魚會用腿在沙子裡先尋找獵物,然後才挖出來食用。其他角魚科物種亦使用牠們的“腿”爬行,但沒有像北海角魚一樣用來品嚐食物。
The northern sea robin has leg-like fins and can use them to claw on sea floor, and a recent study discovered they can use these “legs” for tasting as well!
It uses its legs to search for food in the sand before digging it out. Other sea robins use their “legs” claw, but no other sea robin species are using them for tasting food.
https://sciencealert.com/this-fishs-legs-evolved-a-special-sense-to-find-food-hidden-in-the-sand