© Joseph W. Dougherty. All rights reserved.
Cyclosalpa affinis (Chamisso, 1819)
Although this looks like an odd jellyfish, it is actually a salp. Cyclosalps are pelagic tunicates, from the Urochordate group of early primitive vertebrates, easily distinguished from all others by the chains of linked whorls in the aggregate phase. A widespread inhabitant of tropical and temperate oceanic waters, ranging throughout California and occasionally into the Gulf of Alaska.