Collotheca Video No. 1
Collotheca rotifers are sessile; they are attached to each other forming a spherical colony, or attached singly to the substrate. Each rotifer secretes a gelatinous tube into which it withdraws when disturbed. When it feels safe, it extends and the infundibulum opens like a blossom. Ciliae at the rim's edge sweep food into the mouth at the bottom of the infundibulum.
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