Sure! Here are some whale species and brief descriptions of them.

1. **Humpback Whale**: Popular with whale-watchers because of its distinctive surface behaviors, including breaching. The humpback whale has a body that narrows upwards towards the head, long pectoral fins, and tubercles on its head.
2. **Fin Whale**: The second-longest cetacean on Earth, after the Blue Whale. The fin whale has a long, slender body that's brownish-gray with a pale underside.
3. **Blue Whale**: Believed to be the largest animal to have ever lived on Earth, the blue whale has a grayish-blue color and can grow up to 29.9 meters (98 ft) long.
4. **Bowhead Whale**: Has the largest mouth of any known animal. Named for its distinctive triangular skull, which it uses to break through ice. Once decimated by whaling, the global population is assess as "least concern" due to conservation efforts.
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