How does the lancelet eat and breathe?

Lancelet is the simplest representative of the chorodaceae type. Inhabits the seas. In the body, he has a through digestive tube, no esophagus. The lancelet feeds on a filtration method. Water passes through the mouth, various algae are captured by the cilia, and water exits through the gill slits. Lancelet breathes with the help of gill slits that pierce its pharynx. It is known that there are about 150 pairs of branchial slits in the lancelet pharynx.