This is a REALLY cool jellyfish marble right here! It has loads of tentacles, its UV parts light up like a Christmas tree when you hit it with the black light - and then that opal!! A huge gorgeous spherical opal is part of the jellyfish, and if you look closely, you can see that a black tubular appendage is suctioning the opal and keeping it tucked close inside. Yes - MORE genius glass work from this ultimate master! Great marble at a great price!