I haven't go fishing in years. But spent three weeks in my homeland up north (it's been a while since I had proper holidays!) One of my sisters and I went fishing almost daily. I think the old bug is biting again. Just a few days back home and eager to go fishing again.
It was mostly horse mackerel, loads of chub mackerel and some varieties of seabream in the low activity mackerel periods (for some reason, at least in that area, where you find horse m, there's chub m. around too). Horse mackerel gets active at night. They use come up close to the surface to eat, but when they're not active even all along the night, chub mackerel seems hungry at all times.

It's curious that those two spices are called mackerel in English. Here we call them different and consider the so called horse mackerel not a mackerel at all. Just a distant relative.
BTW, anyone kayak fishing at sea around here? My sister and I are kicking around the idea of getting a pair for the next summer.