dolphins at water front park

family and i saw 2 dolphins circling and bunching up fish and then push them out of the water with their nose before eating them. That was more awesome to watch than any sea world show you could put on. I’ve seen them push bait on the bank before, but not have the teamwork of two like that.
also, the docks of waterfront look like a perfect sheephead spot b/c the oysters are thick on the pilings. am i allowed to pull up in a john boat and fish those pilings. They seriously don’t look touched.