Sealed very well and frozen. Haven’t experimented with it however. Does have a robust fish scent on the outside with the bag. It appears to be yummy. Dolphins and sharks are the predominant predators of Spanish mackerels. Humans have also been a threat to Spanish mackerel, Nearly fishing them to https://martinjrlwj.uzblog.net/the-greatest-guide-to-fresh-frozen-mackerel-45827409