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Glycera is a genus of marine polychaete worms. These are typically brightly colored, burrowing creatures with simple parapodia. A key characteristic of Glycera is its large introvert, which is armed with four chitinous jaws that resemble hooks.1

These worms are found in various marine environments and play a role in their ecosystems. Their feeding habits are closely linked to their physical structure, particularly the anterior end. Some species of Glycera possess jaws on their pharynx, which can be used for feeding on both plant and animal matter.2

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2 Britannica Sources
  1. Glycera
  2. annelid - Food and feeding

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