Cannot be found on land or in fresh water. The coelom is an open, fluid-filled body cavity.
Skin gills provide a space through which oxygen and carbon dioxide are exchanged.
Soften black mushrooms in warm water, remove and discard stems. Squeeze out water. Heat wok or pan and add 1 tbsp. Add 2 cups water and heat to boil. Add prepared sea cucumbers, cook for 3 minutes, then remove from heat and drain.