Identifying fish - East Coast Mallorca

[see attached screenshot]

I am on the southeast coast of Mallorca (Portocolom), and yesterday took a wonderful boat trip around the calas. The captain who runs the trips is very respectful and knowledgeable of the natural area, but even he in all his years of running his boats around the calas has never seen this before, and so couldn't identify these fish swimming in pairs on the surface. This was perhaps 30 meters from the beach line.

One of the other passengers and I took an interest - we wondered if they were Mahi Mahi, but I don't think the dorsal fins match. The only other thing I could narrow them down to is swordfish (they seem the right length, colour, and dorsal fin), but do they go in pairs, and so close to the shore? Maybe the incoming Il Niño, or otherwise global warming is having an effect, who knows (maybe you do!)