This blue one is a "Pointu". That's an old kind of small fishing boat that has become an object of collection. You can usually see one or several of them in the South of France's harbours. There are associations and clubs of Pointu lovers, not all of whom are French!
The last two are fishing boats. There are still of few of them in Cavalaire, where I live. (that's between Toulon and Nice, on the Côte d'Azur). They sell fresh fish in the morning, mostly to the many restaurants we have here.
I think that the fish drawn on the boat is a scorpion fish. We call it "rascasse". The jelly fish we call "méduse". We've had lot of them each summer the last few years.