Poke em with the spinnaker pole, start the engine but don't put it in gear? IMHO I think they see a boat as an invader in their territory and are trying to chase it away. Maybe an underwater speaker playing Lady GaGa music would chase them away.
Those look like smaller younger females. The females have the small curved dorsal finds the males those magnificent tall straight ones. You may have invaded a nursery or birthing area. Be happy you weren't swimming😜 It is their home and not ours after all. I'm glad everyone is safe😁