These are porpoises that are swiftly swimming alongside our ship. One is partly above the surface. The clouds in the sky are reflected in the water. My reflection is also visible as I lean over the side of the boat to take the photo. The boat's anchor is also reflected.
Thanks so much for your comments about my photo of the playful porpoises. I regret not taking a video of them because that would be the only way to remember how cute they were--everyone was just laughing out loud watching their antics.