4 at once, damn good fishing! Is there a possession limit on mackerel there?

There's no regulations from sea fishing that I'm aware of. I'm a guest in the country, "on a contract", but couldn't find anything in regards to limits. This was the first time to get more than one on a line. I've read about it, but got really luck as I noticed the sun fish jumping out of the water close to the pier and just cast right in the middle of them. The mackerel were in a feeding frenzy and the rest is history.