Although jellyfish like the Sea Nettle can propel themselves using a form of jet propulsion where they squeeze water through the bells of their bodies, they cannot move quickly or pursue other animals. They must feed as they drift on the ocean's currents, spreading their tentacles out like nets to catch fish and other unsuspecting prey. Once an animal has been immobilized by the Sea Nettle's sting, special tentacles called "oral arms" begin digesting it even before it has reached the jellyfish's mouth.

Despite this potent sting, Sea Nettles present no real danger to human beings and are often eaten by seabirds and large fish. 

The Pacific Ocean is where this particular Jellyfish resides. California and Oregon are the most common locations where they are found. Around Alaska and Japan into the Baja Peninsula though are also locations where the Pacific Sea Nettle or West Coast Sea Nettle has been found. Today the Oregon population seems to be significantly increasing due to climate changes.