dynamicoceans:Christmas tree wormsThe colorful plumes, or tentacles, are used for passive feeding on
dynamicoceans:Christmas tree wormsThe colorful plumes, or tentacles, are used for passive feeding on suspended food particles and plankton in the water. The plumes are also used for respiration. Though the plumes are visible, most of these worms are anchored in their burrows that they bore into live calcareous coral. Christmas tree worms are very sensitive to disturbances and will rapidly retract into their burrows at the slightest touch or passing shadow. They typically re-emerge a minute later, very slowly, to test the water before fully extending their plumes.Source Videomiracoli -- source link