Japanese Sea Nettle

The Japanese Sea Nettle, (Chrysaora melanaster), also known as the Northern Sea Nettle or Brown Jellyfish, is a species of jellyfish native to the waters of the eastern Pacific Ocean. It is often called the Pacific Sea Nettle, however, this name is also used for Chrysaora fuscescens. The name “Japanese Sea Nettle” is also used for Chrysaora pacifica.

This species’ medusa (umbrella or dome) can reach up to 24 inches in length with tentacles growing up to 10 feet long. C. melanaster dwells at depths of up to 330 feet, where it feeds on copepods, lardaceous, small fish, large zooplankton, and other species of jellyfish.

The sting of this animal is relatively mild, although it can cause serious skin irritation and burning.