Got them both from LFS in Appleton(Craig's store)
The bubble tip I had last April in a 90 gallon, with Compact flourescents, it was large and healthy, clowns took to it right away.(ocellaris). Fine for two days, then dead. When I removed it, it had a circular hole in the middle of the base, clear through.
The long tentacle I have in a 40 breeder with compact flourescents. When I purchased it was good and sticky, a bit deflated. Once in my tank, it wedged itself between some rock and expanded beautifully. Was fine and stayed in place for about 6 weeks then one day pulled out and has settled on the sand. Last week i found it upsidedown with what appeared to be a nickle size dent in the base, as if something had chewed away at it in a circular fashion.
I had moved last May, so some of the rock in the 40 was from the 90, that is why I think it is possible that the same thing may have eaten them. That, along with the suddeness of the bubble-tips demise.