february: CROWN JELLYFISH

The crown jellyfish (also known as the cauliflower jellyfish) is a collective noun for 6 different jellyfish families. There is a lot that is yet to be discovered about this jellyfish. Other than the fact that it's edible and totally harmless to humans there isn't much information about it.

may: PACIFIC SEA NETTLE

The pacific sea nettle's latin name is Chrysaora which is a reference for a greek mythological figure, Chrysaor, the son of Poseidon and Medusa and the brother of Pegasus. He was born when Perseus decapitated Medusa. Chrysaor's name translates to "he who has a golden sword", the name probably refers to the jellyfish's painful sting.

april: COMB JELLYFISH

Unlike other types of jellyfish this species doesn't use stingers. Instead they have a big "mouth" that can open very wide and basically suck in the prey, which can be almost the same size as the jellyfish itself. They also have a tendency to eat their own conspecifics.
It's improtant to note that this is NOT an actual jellyfish, only a close relative, however they are still very cool and deserve a place here.

june: BLUE BLUBBER JELLYFISH

Despite its name the blue blubber jellyfish vary in color based on which part of the world it is from. The blue blubber have eight tentacles, with small "mouth-like" openings on each of them, these openings work to capture the prey and transport it to the jelly's stomach.