To elaborate amphioxus is also known as lancelets. They're small marine animals (rarely more than 3 inches long) that look like fish with no eyes or definite heads. They typically dwell in warm coastal waters. They are thought to be close relatives of vertebrates. Unlike other chordates they are able to digest things. Breeding may occur many time in a year. Eggs are fertilized in the water and become larvae in a few days.
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