What does a seal mean?

The fur seal is a mammal that lives in the ocean, belonging to the family Furidae of Pinpoda. They usually live in the cold waters of the Arctic and Antarctic, and near the coastlines of some temperate regions. Seals have special adaptability. They can swim and dive in the water and survive in cold water. Their bodies are streamlined, their muscles and flippers are developed, and they can move flexibly in the water. Seals mainly feed on marine organisms such as fish and shellfish, and are an important part of the marine food chain.