Plural form of captaculum; small tentacle-like structures, especially in cephalopods or other marine organisms.
From Latin captaculum, derived from captare, 'to seize or grasp.' The diminutive form emphasizes small grasping appendages found in various marine creatures.
Squid and octopuses have 'captacula'—specialized feeding tentacles with suction cups that allow them to sense and grab prey in the dark ocean depths, making them some of nature's most sophisticated hunters.
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