Why do some sea cucumbers eject their internal organs?
Quick Answer
Sea cucumbers can expel internal organs as a defense mechanism to distract or deter predators. Many later regenerate the lost parts.
The Full Story
Some sea cucumbers have a dramatic defense strategy called evisceration, in which they expel parts of their internal organs, often through the anus or body wall. This can confuse predators or make the animal less appealing to eat. Afterward, many species can regenerate the missing organs over time. The behavior is especially associated with stress, attack, or environmental disturbance. Sea cucumbers are also ecologically important because many species recycle sediments on the seafloor.
Key Facts
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