I wouldnt know about the Crushed coarl sence they like to get down in the sand, but dont those things give off one hell of a eletric shock? good luck if you decide to get one.
I caught one in Galveston many many years ago and put it in my tank (when I was in High School Aquatic Science Class). I hadn't a clue what it was and it ate all my fish within a day. I had crushed coral in that tank and it wasn't phased. Have fun :joy: