March 14, 2019 — On a blustery winter afternoon off the coast of Virginia Beach, people are pressing forward on the bow of the Virginia Aquarium and Marine Science Center’s whale watching boat as a dorsal fin breaks the surface. Cameras click in staccato for a second or two before the humpback whale dives to feed again.
The relatively small dorsal fin belies the humpback’s size. Calves weigh about a ton. Adults can grow heavier than a yellow school bus loaded with kindergarten students. Few things that swim in the sea can break their bones.
A mile to the north, however, by the mouth of Chesapeake Bay, a massive cargo ship is pushing south toward the whales. On this Saturday in late January, these humpbacks are swimming in traffic in the shipping channel that leads vessels to and from some of America’s busiest ports. These shipping vessels are one of the few true physical threats to humpback whales.
“Those big ships, they’re churning up the water and the fish are coming through and that’s what the whales are going for,” says Mark Sedaca, captain of the 65-foot Atlantic Explorer on this whale watching trip.