Dolphins always give people a cool feeling! They are honest, friendly and intelligent, so they are widely loved by people. Dolphin watching is definitely a fun experience, whether in the sea or in an aquarium. However, little is often known about dolphins.

Dolphins are small to medium-sized cetaceans, with a body length of about 1.5-10 meters and a weight of about 50-7000 kg. Male dolphins are usually larger than females. They mainly inhabit warm tropical waters, but a few dolphins also prefer colder waters. Dolphins usually live in shallow water or at least stay near the surface.

Dolphins can have anywhere from 8 to 250 teeth, which are used to catch their prey, but instead of chewing them, dolphins swallow the food whole. A bottlenose dolphin has 80 to 100 teeth. Many people know that dolphins have extremely acute hearing, but did you know that dolphins have no sense of smell? Because they lack the olfactory nerve.

If you had to choose one of the smartest animals in the world, what would you choose? Maybe the first reaction of many people is dolphins. The number of times you see dolphins is not very large, usually in the aquarium, but they will leave a very deep impression on people. After the dolphins in the aquarium are trained by the trainers, their overall quality has made a great leap. They can perform many difficult movements through cues from their trainers. For example, after the dolphin jumped from the water, it used its long mouth to hit a small ball in the sky, and then fell into the water with a graceful movement, just as charming and agile as a elf.

One has to ask, why are dolphins smarter than other animals? Scientists have carried out long-term research, and they have found that dolphins have two brains, so dolphins have a particularly strong learning ability. With a little training, you can make acrobatic movements of various difficulty. The dolphin's brain accounts for 1.2% of the body weight, while the chimpanzee only accounts for 0.7%.

The most amazing thing about dolphins is that they love humans. Dolphins are very ferocious aquatic creatures, they can attack sharks, but rarely do dolphins attack people. On the contrary, it has happened many times that dolphins save people. Usually people are attacked by sharks in the sea, and dolphins come around to drive away the sharks. Sometimes dolphins even carry people to shore. Wild dolphins also often swim to shore to play with humans.

As mammals, dolphins have many characteristics similar to humans. However, because dolphins live in the sea, which is different from the terrestrial environment of humans, there will be some differences in the way they are born. Dolphins are born tail first, while human babies are born head first. In addition, female dolphins generally take eleven months to conceive before giving birth to calf. Newborn dolphins mainly rely on the mother's milk for food, so the calf dolphins have been closely following the mother from birth. Until the age of three, after learning to fish and other survival skills, the calf dolphins gradually move away from the mother dolphin group and live with friends.

The last thing to mention is that dolphins are good friends of human beings, and we should know how to protect them. The number of dolphins is running out. In order to keep the number of dolphins from decreasing, we must protect the environment and the home they depend on.