...wow... thx for video!
Unfortunately, I bet you this i not the Mediterranean... I did see a "mullet frenzy" the other day... just as I heard a boat's toilet being flushed...

Have been lucky enough to see it and experience it first hand once when around 25nm offshore on the West coast out from Gozo. Was with SimonG and Fin at the time and as luck would have it back then we were not prepared and only had two rods/reels, one was a Lineaeffe KAM1000 which broke!!! and the other a late 1960's Penn Senator that had never been serviced.....it didn't break but the drag was a bit sticky.
I'm told I was lucky to come across such an event, as far as the eye could see there were 20kgs BFT jumping around. The good ole days!