While doing a 30 mph with a tiller steering outboard motor [white knuckle], I have been passed by Dall's Porpoise doing 35 mph under my 14' boat. https://en.wikipedia.org/wiki/Dall%27s_porpoise
There is nothing noble in being superior to your fellow man; true nobility is being superior to your former self. -Ernest Hemingway The man who makes no mistakes does not usually make anything.-- Edward John Phelps