Probably, but how would we know?
The naruma jellyfish. It has been discovered in November 2009.
It is possible to find jellyfish fossils, but they are rare because jellyfish have soft bodies that are not easily preserved. In some cases, fossilized impressions of jellyfish have been discovered in certain types of sedimentary rocks that have preserved their soft tissue.
The lions mane jellyfish was first discovered in 1870 when there was one found washed up on the shore at Massachusetts Bay.
1964 by Dr. Jack Barnes.
Prof. Robert Ignaz Lendlmayer von Lendenfield.
You can not get rid of jellyfish, they have been in the ocean forever. They are here to stay.
The English popular name jellyfish has been in use since 1796.
It's been speculated that increasing fishing activity have caused jellyfish predator numbers to dwindle, thus allowing jellyfish numbers to increase. Large masses of jellyfish have been referred to in the ecological and oceanic communities as "jellyfish joyrides". All jellyfish have the ability to sting their prey, and in massive numbers they become far more hazardous to life. Humans have been victims of jellyfish attacks, sometimes resulting in death due to excessive levels of venom from jellyfish stingers.
It has been recently discovered that the Irukandji jellyfish is more deadly than is larger cousin Chironex fleckeri also known as the box jellyfish
Jellyfish were not even alive during the Precambrian era because only single-celled organisms lived.
69%
There are many species of jellyfish. Most of them eat plankton some though have been known to eat smaller jellyfish. None are known to eat damselfish.