Moon Jelly (Aurelia aurita)
The artist clearly dropped the ball on this illustration. The four horseshoe shaped gonads are not clearly visible. Moon jellies are super common and found pretty much anywhere there’s an ocean. If you accidentally slip and fall on your ass at the beach, it’s probably due to a moon jelly. Happened to me walking the dog more than I’d like to admit. You can chill out live with the moon jellies at the Monterey Bay Aquarium:
Soft and lightweight, pre-shrunk, 100% combed cotton.