Allora… qual è il problema con i tuoi delfini pericolosi?

I cycled the Archipelago Trail last week and noticed this sign on one of the ferries — what exactly do the dolphins do that is so dangerous??

Edit: Oh – thank you all for the quick responses! That makes a lot more sense (though is somewhat disappointing – earlier in the week I watched a seagull land on a kid’s head and steal the food out of his hands, so I was enjoying thinking about what hijinks Finnish dolphins might be getting up to)

Hehe. A dolphin, as in the maritime structure.