Lone Wild Dolphin Under Forth Bridge in Scotland

I met "Derek" the Dolphin in 2024 when he was just a baby. Now he's a good sized dolphin. I try to get down once every couple of months to see him. Usually, as soon as he hears my eFoil, he'll come say Hi. Couple of assumptions : I'm assuming he's a male dolphin!!! He might not be but i don't think he's a purpoise either. I'll upload other videos of him soon.