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Where do adult cephalochordates usually live?
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Chordate
X-ray fish (Pristella maxillaris), is an example of a chordate with a visible backbone.
Adult cephalochordates, also known as lancelets, are small, fishlike marine animals that typically inhabit shallow coastal waters throughout tropical and temperate regions.123
They live in soft substrates, such as sand, coarse shelly sand, or gravel, where they remain partially or entirely buried. Often, they position themselves with their mouths protruding above the surface of the ocean floor, which allows them to filter-feed on food particles suspended in the water.241