Readers will find many of the images riveting, just as Hoyt did. "Anyone with a bit of curiosity about what's going on below the surface of the sea is absolutely spoiled for choice," he said.
Among his favorite creatures are sperm whales, and beaked whales able to move from the surface of the sea to a mile or two down, all within minutes, instantly adapting to darkness and water pressure that would crush humans. Cuvier's beaked whales dive to record depths of nearly 10,000 feet and remain underwater up to 137 minutes, also a record.
Then there is the acorn worm, which could be our distant ancestor. This elegant mud-eater, which feeds on seafloor sediment and was only discovered in 2010, has features of both invertebrates and vertebrates.