We recently bought this. We were told it was an upside down jellyfish. However everything we have researched, nothing even closely resembles what we have! Also we have only had this in our tank for 3-4 days and we have now lost 2 fish! A black clownfish and a Moorish idol. We watched the Moorish idol swimming around "it" and the next thing we know our beautiful fish starting acting very odd and turned upside down...within seconds! Please help! I really would like to know what this is and if this is what is killing my fish! We have checked all of our levels and everything is fine...nothing else makes sense to what is killing our fish!