OMG I was stung by a jelly fish in Hawaii in 1978 I also have not been in the ocean since then that was the most God awful pain and infection I have ever had!!! I live right on the beach in CA. and refuse to go in the water!!!
I got stung near the Santa Monica in the 70’s.
What its like to be stung by a stonefish
Probably a box jellyfish. I believe the big ones can be fatal it you contact around a meter’s worth of tentacles.
OTOH, Australia has them as well, and its small cousin, with a thimble-sized head, and maybe 4” tentacles, as little as an inch or less of contact can be fatal, and even being barely hit can give 1-2 days of waves of full body pain.