Extract triplets from the following text in the order of [Subject, Object, Predicate]:

During the breeding season, the blue whale migrates from their feeding grounds to areas with warmer water. In the Northern Hemisphere, they migrate to areas such as the Gulf of California, the coast of California, and the southeastern Pacific Ocean, while in the Southern Hemisphere, they migrate to areas such as the coast of Chile, the South Atlantic, and the Indian Ocean.
The blue whale is one of the largest animals on Earth and is known for its impressive size, reaching up to 100 feet (30 meters) in length and weighing up to 200 tons. Their migration patterns are not fully understood, but it is believed that they travel thousands of miles each year to reach their breeding grounds.
Breeding occurs in warm, shallow waters where the female blue whale gives birth to a single calf after a gestation period of approximately one year. The calf is nursed with the mother's milk, which is high in fat and contains important nutrients, for several months before it begins to forage for food on its own.
The blue whale is an endangered species and is protected by international law. Its population has been depleted by commercial whaling, and it continues to face threats from human activities such as ship strikes and pollution.