The Demetre park pier is the most frequent place I fish from since I’ve started, I’ve seen bluefish, rays, sharks, eel, a ton of croaker is what I’ve been catching, but this one is a first for me. I’m unfamiliar with mackerel so please correct me if I got the species wrong. The dorsal fin was black when pulled up, how old do you suppose it is? Only other thing I caught was 2 croaker and a very old rusty crab trap covered in barnacles, I should have brought a towel.