| Lifespan: | Up to 65 years. |
| Population: | 54,000, about a fifth of its pre-whaling population where 238,000 were taken. The Sei Whale is now an internationally protected species. The Japanese continue to kill them every year for "research purposes". |
| Diet: | Consumes an average of 900 kilograms (2,000 lbs) of food each day, primarily copepods and krill, and other zooplankton. |
| Group Size: | Sei Whales usually travel alone or in small groups of up to six individuals |
| Adults: |
Length: 20 meters (66 feet) Weight: 50 tons |
| FYI: | The Sei Whale is among the fastest of all cetaceans. It can reach speeds of up to 50 kilometers per hour (31 mph, 27 knots) over short distances. |
