I see no ships, but ...

Approaching the Traffic Separation Zone, north and west of NFL, J asks me to keep watch for shipping. And as I'm watching, and seeing nothing, and writing this, I see a blow, a fin, THREE whale backs in a group next to the boat, and more, further off. I shriek for J down below. They just stay there, near enough to pat, near enough. And after we pass, they dive, slow motion, flukes high in the air - humpbacks!