no i can not get a pic! i dont know if it is a sponge. i bought the rock from a BR member, i believe he has had it for 2 years and yes i did move the rock, just to get it out of the way to remove something from the tank. how can i tell if it is a sponge?? i know the gentleman that i bought it from had a beautiful reef tank but could it have been part of a coral or something that he removed from the rock?