Sei whale

The sei whale is a sleek, steel-grey giant of the ocean, known as the third-largest baleen whale after the blue and fin whales. It zips through the water at impressive speeds, making it one of the fastest swimmers among whales.

• It can grow up to 19.5 meters (64 feet) long.
• Weighs as much as 28 metric tons.
• Can reach speeds of 50–55 km/h (31–34 mph) over short distances.