Pacific Sea Nettles

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Pacific Sea Nettles

Pacific Sea Nettles Chrysaora fuscescens
Natural History
Pacific Sea Nettles, Chrysaora fuscescens, are most commonly found along the California and Oregon coasts, and range into the Gulf of Alaska and Mexico. The animals are medusivores, meaning they dine on other jelly species. Brown Sea Nettles are equipped with nematocysts or stinging cells, which are located within their tentacles. The animal has no control over what it stings, and does so instantly when touched. 
Fast Facts

  • Worldwide, there are more than 200 species of jellies. 

  • Jellies are made up of 95% water and have no heart, brains, or bones.

  • Movement is primarily controlled by Bay and ocean currents, even though they do “pulsate.”

Jelly species are being directly affected by climate change. Jellies thrive in warmer waters, so as water temperatures continue to rise, jelly populations and range increase. They are one of the few species that is benefitting from this worldwide disruption of temperature patterns, however their increase in population can cause an imbalance in ocean ecosystems. Information about this increase in jelly populations, referred to as jelly blooms, is shared with guests in the Aquarium's "Go With the Flow" exhibit.
Bonus Tips

  • Aquarium of the Bay has cultured Moon jellies in-house since 1998.  For an up-close look at the life cycle of a Moon jelly, register for a Behind the Scenes tour.

  • Enjoy a sneak peek, moment of Jelly Zen 



Ready to meet our Pacific Sea Nettles? Buy your tickets now!