Sea Walnut (Pleurobrachia pileus)

Tidepool Tim says,  “Sea gooseberries arrive in great swarms each spring - there are literally tens of millions of them in our bay.  We don't always find them though. Prevailing winds and tides can deliver them to opposite shores each day. Some summers there are lots and other summers we see none. Looking closely at a gooseberry will reveal two long whitish tentacles trailing out behind the jelly. These are used to fish for food. Along the oval-shaped body, there are 8-rows of cilia. These beat in waves and propel the little sphere along its way! They actually can swim along quite fast. Once their tentacles contact food, the catch is reeled in and put into its mouth. They catch planktonic animals, fish, shrimp, and worms. Amazing!”