TED-Ed: The most important anus in the ocean

Sea cucumbers, part of the Echinodermata phylum, play a crucial role in marine ecosystems. They have unique anatomical features, such as breathing through their anuses, and engage in symbiotic relationships with other marine species. Their defense mechanisms include evisceration, where they expel internal organs to deter predators. Sea cucumbers are vital for nutrient recycling and maintaining healthy ocean floors, significantly impacting marine biodiversity and ecosystem health.

In what ways do sea cucumbers interact with other marine species?

What is the significance of the mutable collagenous tissue (MCT) in sea cucumbers?