"Now say it to the sea nettle."

In late summer, the warm Chesapeake waters were plagued with sea nettles, small stinging jellyfish.

Each sea nettle is either in a free-swimming stage or a polyp stage.

In a moment he announced: "It's a sea nettle.

This sea nettle was a largely unknown quantity.

An underwater view of a jellyfish - this is the aptly named sea nettle.

There is a sandy beach, where swimming is possible until mid-July, when the sea nettles arrive.

By spreading out their tentacles like a large net, the sea nettle is able to catch food as it passes by.

The oral arms begin digestion as they transport the prey into the sea nettle's mouth.

The water is generally free of sea nettles because the water is not very salty.