What is this

[juarez24]

I have lost several fish in the past few days and wondering if this had anything to do with it? Thanks

 

[juarez24]

 

[juarez24]

here are the images

here are the images

http://www.flickr.com/photos/95242311@N06/8680482860/in/photostream
http://www.flickr.com/photos/95242311@N06/8679372879/in/photostream/

 

[OrionN]

That is a S. helianthus, a Atlantic carpet anemone, that well know to eat fish.