is this a bubble tip?

[stilo]

Hello everybody i have three of these guys growing on my rocks and have no idea what they actually are first thought was bubble tips but not really sure any body know if they are and if there not what are they?

 

[carey]

Looks like majano anemones to me. A pest anemone similar to aipastia. :-(

 

[MINItron]

Not majanos, google pseudocorynactis. If they were in bunches I would say corynactis.

 

[stilo]

Thanks i googled Pseudocorynactis and I'm pretty sure that's it but the site I've been reading says its not suitable for aquariums housing fish and I'm worried because i actually had a fish die today didn't look like any of the illnesses I've seen and no signs of stress to any other fish after reading this makes me think the psuedocorynactis might have been the problem any one know if this could kill a fish ? And if yes what's the best method of removal?

 

[MINItron]

They don't just randomly kill things. The problem that some pseudocorynactis can pose is that they can get large enough to eat small fish. They are not inherently bad, and there is some other underlying cause of your fish's death.