Did a whale watch through the New England Aquarium last weekend. Two of my favorite shots:

Both 5DIII with the Sigma 150-600S

150 mm, 1/800, f/8, ISO 400
small-8733 by kayaker72, on Flickr

440 mm, 1/1600 (the boat was all over the place), f/8, ISO 400

small-8882 by kayaker72, on Flickr

Thanks for viewing...Brant