Melon jellyfish is a pear-shaped sea gooseberry which propels itself with vibrating combs located along its rim. It is somewhat larger than a sea gooseberry and much less rigid in structure. Melon jellyfish have a large round opening underneath. This opening is the mouth, with which they swallow their food in one gulp. Because melon jellyfish are transparent, you can sometimes see food in the stomach. Some people say that they resemble a bishop's mitre.