Spinners Sharks

[JerseyMike]

Yesterday while enjoying the (South wind 5-10 with 2-3 ft seas) which resulted in small craft warnings... We were in the area of the mud buoy / dumping grounds fluke fishing around 10 am we started noticing a shark swimming by the boat checking us out, then we noticed it wasn't one shark but several sharks, within 20 minutes we had a school of sharks swim by numbering in the hundreds! They varied in size from 4 - 8 ft long. They were like a bunch of roudy kids coming up to the boat and doing tail slaps. Many of them were free jumping and spinning, which leads me to believe these were spinner sharks. Has anyone else seen these sharks? I've been fishing the NJ shore for 40 years, never saw anything like that before...