<a href=showthread.php?s=&postid=14750527#post14750527 target=_blank>Originally posted</a> by redfishsc
I personally haven't heard of nematocysts floating through the water, although I suppose it's possible.
I wasn't thinking of the nematocysts by themselves, but if the anemone was pureed sufficiently, and/or the circulation was strong enough, then bits of the anemone would be whipped around in the current, and be rather uncomfortable.
I remember swimming in Florida and getting stung by bits of jellyfish tentacles that were in the water (there was a bloom of them) , and it was really kind of painful and annoying - like little bee stings that would leave welts where the tentacle hit you.
The worst part of it was that it wasn't a whole jellyfish so that you could see it and avoid it, but just stray bits of tentacle -- you couldn't see them, but you sure could feel them and they would leave marks when they hit you.
If it was ammonia that killed the fish, I would imagine that the corals would be pretty badly affected as well, rather than looking "OK".