A class of sea cucumbers characterized by their shield-shaped feeding tentacles arranged in a ring around their mouth.
From Greek 'aspis' (shield) + 'cheirota' (hand-shaped), referring to the hand-like or shield-like tentacles used for feeding.
Sea cucumbers with shield-shaped tentacles can extend these appendages to filter food from the ocean—they look alien, but they're actually gentle bottom-feeders that recycle ocean nutrients!
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