He has tagged and tracked a wide variety of marine mammals, including harbor seals, pilot whales, gray whales, right whales, bowhead whales, humpback whales, sperm whales, fin whales and blue whales.

• 他标记并跟踪各种各样的海洋哺乳动物，包括港海豹、领航鲸、灰鲸、右鲸、弓头鲸、座头鲸、抹香鲸、长须鲸和蓝鲸。