aquachef, there is no white sebae anemone, what you have is a bleached/unhealthy Heteractis Crispa, from capture to you it has been mishandled, it will require lots of light and careful feeding if it survives, upside down and oozing is a bad sign, check to see if the tentacles are still sticky if not its dead, if you gently bring it to the surface and smell it, if it stinks get it out or the whole tank will be polluted.
If you want to try again some time just ask us about whats needed and we will happily fill you in.Best luck!