sentence: Most sea cucumbers are scavengers.
sentences_before: Sea cucumbers' are a class of echinoderms, the 'Holothuroidea'. They have a longish body, and leathery skin. Sea cucumbers live on the floor of the ocean.
sentences_after: There are about 1500 species of sea cucumbers. Sea cucumbers have a unique respiratory system, and effective defences against predators. Chinese eat them.
concept_name: sea cucumber
headings: Sea cucumber
categories: Echinoderms