never
I believe it to be the Irukandji jellyfish, found near Australia.
The box jellie
box jellyfish
About 1800
jellyfish
Sand Jellyfish live in Asian Waters around Japan and Hong Kong.
nearly everywhere in some form
The snail was introduced to earth in the Late Cambrien period.
It is native to the West Pacific from Australia to Japan, but has been introduced widely elsewhere.
The Box Jellyfish the 3rd most deadliest creature on earth in Australia and the barrier reef
no not all jellyfish can kill, watch the episode on planet earth because some jelly fish are used in doc's placesss!!
First animal on the Earth was a jellyfish. See below-