Black Sea nettle, Monterey Bay Aquarium.
The black sea nettle is considered a giant jelly; its distinctive purplish bell can reach over three feet in diameter; its lacy, pinkish oral arms can reach nearly 20 feet in length and its stinging tentacles 25 feet or more. It probably lives in deeper, calmer waters but has appeared in large blooms in coastal areas off Southern California, most recently in 1999.
