It is a general term for all species in the bird class and penguin family. Penguins, known as the "boats of the ocean," are one of the oldest waterfowl and are likely to have settled in Antarctica before putting on ice armor on Earth. Most of them are distributed and live in the southern hemisphere. Characterized by the inability to fly; Generally speaking, the legs and knees of a penguin are hidden in its belly, and its feet are located at the bottom of its body. Can live and reproduce in extremely cold climates. On land, it looks like a Western gentleman in a tailcoat, swaying and swaying as it walks, encountering danger, falling and crawling in a disheveled manner. Mainly feeds on krill, squid, and small fish.

The Nanluji dolphin is the only dolphin in the southern hemisphere without a dorsal fin. Distributed around Antarctica. Mainly found in temperate waters, with most records occurring in the northern part of the Antarctic Circle. Often following the Humboldt cold ocean currents to subtropical latitudes, possibly as far as the northern coast of Chile at 19 degrees south latitude. Prey various fish and squid, especially lanternfish, which is the most common. Enjoy group tours, with hundreds or even thousands of people forming groups. Southern ridge dolphins may be mistaken for penguins when they are far away from the sea or traveling rapidly; And when it slowly marches, it will be mistaken for a sea dog or sea lion. The southern humpback dolphin is named after the larger, wingless southern right whale.