Ancient Sharks Thrive in Shallow Waters Off US Coast

Ancient sixgill sharks, creatures that predate the dinosaurs, have been found thriving in unusually shallow waters just 20 feet deep off the U.S. coast. These massive sharks, scientifically known as Bluntnose sixgill sharks, typically inhabit depths of up to 9,800 feet. Researchers have observed them year-round in Washington State's Puget Sound, leading to the hypothesis that these waters serve as a crucial nursery for their pups.

The young sharks, or pups, appear to utilize the Salish Sea's southern areas during summer and fall before migrating north in winter and spring. Scientists suspect these patterns repeat until the sharks eventually venture into the open ocean. Researchers from Seattle Aquarium are conducting studies from May to September, tagging the sharks to gain insights into their migration, growth, and prey preferences.

This ongoing research aims to answer critical questions about the life history and ecology of these elusive predators. The study involves carefully capturing the sharks, collecting vital data, and fitting them with tracking tags before releasing them. Collaborations with various agencies and institutions are underway to ensure comprehensive data collection while prioritizing animal welfare.