We call this original fossil Baleen whale "Cookie Monster". It is comprised of a skull with lower jaws, many vertebrae, and several ribs. It is prepared in situ displayed at an angle.

Baleen whales swim rapidly at their prey with a wide-open mouth creating 90-degree angle with their lower jaw, after engulfing as much as possible they then expel the water through the Baleen leaving behind only the food to be swallowed. The largest living animal species is the Blue Whale, which reaches lengths of 110 feet (33.5 m). ‘Cookie Monster’, would have been around 15 feet (4.6 m) long.

Plesiocetus and other fossil whale bones are often found with gashes from what is believed to be Carcharodon sharks, whose teeth are also found in the Pisco Formation.

"Cookie Monster" would be at home in any marine exhibit, but is especially recommended as a scientifically interesting and exciting aquarium showpiece.