Not a skipjack. Skipjack only has a few stripes and they are 100% horizontal. What you are looking at is a true Atlantic bonito. They are the link between the tuna family and the mackerel family. We used to call those "northern mackerel ". Not bad eating. Used to catch a ton of those off the old Dan Russell pier in PC, but I've never caught a single one off PB pier, either the old wood pier or the new cement pier.