Tunicates

Tunicates, also known as urochordata, tunicata (and by the common names of urochordates, sea squirts, and sea pork) are a group of underwater sac-like filter feeders with incurrent and excurrent siphons, and are part of the phylum Chordata. Sea squirts feed by taking in water through the oral siphon. The water enters the mouth and pharynx, flows through mucus-covered gill slits (also called pharyngeal stigmata) into a water chamber called the atrium, then exits through the atrial siphon (source: Wikipedia). Go to www.coralscience.org to learn more about this species!