I went snorkeling off a small beach area in the Northern part of Oahu, hoping to catch some morning dolphins, who sometimes swim close to shore. Unfortuantely, there weren't any, so I instead spent the time following around some large schools of fish. I believe these fish to be herring. The school of fish was incredibly massive, and moved together so well, and I was able to capture the edge of it, as they swirled around me.