How many species of jellyfish were there in ancient times

Hai Yue jellyfish, Xia jellyfish, jellyfish and so on.

1, sea moon jellyfish in the Three Kingdoms period has been recorded, the shape of the round as the moon, living in the ocean, often floating near the surface of the water, and the modern jellyfish is a relative, the appearance is also similar.

2, Xia jellyfish body size is larger, can be like a bed, living in the ocean, often in the water near the surface of the floating.

3. Jellyfish live in the ocean and often float near the surface, and modern jellyfish are relatives and similar in appearance.