Chrysaora chesapeakei (formerly known as Chrysaora quinquecirrha). Learn why the name was changed.
The sea nettle is the most common jelly in Chesapeake Bay during summer, and can be present from May to October. It is generally confined to brackish waters with salinities between 10 and 16 parts per thousand (ppt; seawater is typically 32-36 ppt). It prefers water temperatures between 78 - 86º F.
The sting is moderately painful, but not dangerous unless there is an allergic reaction.
An adult can have a bell to up to 8 inches in diameter, with 24 tentacles several feet long.
Sea nettles in the upper reaches of Chesapeake Bay are usually milky white; those in the lower, saltier portions of the Bay are more likely to have reddish-brown to purplish stripes or splotches.
- Bell with fairly thick dome
- Tentacles closely and evenly spaced around bell
- 4 long and ruffled oral arms emerge from under bell