Vessel-whale collisions are a significant concern in Glacier Bay National Park and Preserve, where nutrient-rich waters support a seasonal influx of humpback whales and other marine mammals. As one of the most visited marine parks in Alaska, Glacier Bay sees a high volume of vessel traffic, including cruise ships, tour boats, and private craft.

This summer an adult humpback whale was seen with a fresh, one-foot gash behind its dorsal fin which appeared to be from contact with a boat propeller. This week the Traveler's Lynn Riddick reaches out to biologist Chris Gabriele to discuss this incident and the park's strategies to reduce whale collisions, including monitoring whale activity, warning systems, and public education.