People commute mindlessly over the Golden Gate Bridge day after day without realizing that whales, sea lions, seals and harbor porpoises congregate here still.

Similarly, bowheads seem to be thriving, and humpback whales, harbor porpoises, and salmon are expanding their range.

Echo Hunter would have been about the size of a modern day harbor porpoise, and would have resembled a small dolphin, Dr. Churchill said.