Great video! What kind of camera were you using?
Also, I've seen the Jakcs referred to as both Euro and Ero - the park's website says Eurojacks:
Activities for John U. Lloyd Beach State Park Florida State Parks
"Scuba Diving
For those interested in the underwater beauty of South Florida, Lloyd Beach has one of the easiest and interesting shore dives in the area. You can follow the submerged Eurojacks to the first reef. This allows snorkelers and divers to see a vast array of sealife including tropical and sport fish, sharks and Florida lobster. "