Saccoglossus bromophenolosus

 Description:  S. bromophenolosus is found from Maine to Nova Scotia and in at least two bays in Washington State. The worm was likely introduced to Washington State by the oyster industry in the early 1900s.
 Gene Links: Saccoglossus bromophenolosus in GenBank


 Close up of the gill pores on a the trunk of a live
S. bromophenolosus.

 A 10 day old S. bromophenolosus worm with one gill slit and post anal tail.