Upside down Jelly?

[BIGgourami]

put it in the sump...... problem solved....

as I recall they do have a rather potent sting ans can capture fish...

 

[philliptobin]

Found the thead with the pictures of the upside-down jellyfish I had in my reef tank.

http://www.monsterfishkeepers.com/forums/showthread.php?t=32609&highlight=jellyfish&page=3

check it out.