Non veni pacem mittere, sed gladium.
Dolphins love to surf the bow wave of sailboats. One day I stretched down to touch a dolphin, he rolled over on his side and gave me a look as if to say,'don't do that again!" I didn't.
I wouldn't worry about getting bitten. I would worry about concentrating so much on the interaction that I fell under the bow of the moving boat. We lived on a sailboat for twelve years and saw many dolphins and porpoise. There is a difference.