The humpback whale is a mammal belonging to the family Cetidae in the order Cetacean. Enlarged body, broad upper jaw, with tumor like protrusions along the central line from the breathing hole to the snout and on both sides of the upper and lower jaws; The dorsal fin is relatively small, located at 2/3 of the posterior body length; The fin limbs are very large, about one-third of the body length, with irregular serrated protrusions on the leading edge; The caudal fin is wide and the outer edge is also irregularly serrated; There are fewer folds and grooves on the ventral surface, ranging from 14 to 35, extending from the lower jaw to the front of the navel. The back is black with black stripes, the abdomen is black or white, and the body color varies greatly among individuals; There are more white parts above the fins than black parts, and white parts below; The ventral surface of the caudal fin is white, with black edges.

Blue whale is a marine mammal belonging to the family of baleen whales and the genus of baleen whales. There are four subspecies in total. The blue whale is considered the largest animal known to have lived on Earth, measuring up to 33 meters in length and weighing 181 tons. The body of a blue whale is slender and long, with a bluish gray back, but sometimes it appears lighter in water. The fin limbs of blue whales are 3-4 meters long. Above is gray with narrow white edges. Below is completely white. The head and tail fins are generally gray. But the back and sometimes the fins are usually mottled.

Sperm whales are marine mammals belonging to the order Cetiformes and family Spermatidae. With a body length of up to 18 meters and a weight of over 50 tons, it is the largest toothed whale, with its head occupying one-third of its body. The head is huge, the lower jaw is small, and only the lower jaw has teeth. No dorsal fin; Highly capable of diving, it is the mammal with the deepest and longest diving time. Like a fish in size, it breathes through its lungs. Short neck, the head seems to be connected to the torso; Cervical spine healing; The nostrils are spray holes located at the snout end, the forelimbs become fins, the forearms degenerate, the palms become longer, and the number of toes increases, but the toes and claws cannot be seen from the outside; Hind limb degeneration; The tail is like a fish, with horizontal tail fins, and it swings by the tail when swimming.