Plural of eyestalk; multiple stalk-like structures bearing eyes on crustaceans and other animals.
From 'eye' + 'stalk' (plural -s). The plural form of the anatomical compound describing mobile eye-bearing structures in arthropods.
A horseshoe crab's eyestalks reveal something amazing: their eyes move on stalks so they can watch for predators while staying almost perfectly still on the ocean floor, demonstrating that evolution tailors vision to each creature's survival strategy.
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