This is a rather complicated process und allows dolphins to shut one eye and execute simple swimming movements simultaneously. Yet it sometimes happens that a dolphin “forgets” to resurface and breathe. The answer is: Just like a computer they activate an energy saving mode by reducing the activities of one of their cerebral hemispheres. Therefore, dolphins have to swim while they are sleeping, because they have to come up to the surface to breathe. They have to permanently stay close to the water surface to be able to breathe, as they are no fish but mammals with lungs. Photo: alekss-sp/Shutterstock Anatomy and Appearance How Do Dolphins Sleep? If a dolphin is ill, injured or just giving birth to a dolphin baby, the others protect it and transport it to the water surface so that it can breathe. Some dolphin species round up fish by means of clicking sounds before attacking them. How Do They Hunt?ĭolphins always hunt together. On average it is about 984 feet (300 meters) for a maximum of 20 minutes. How Deep Do Dolphins Dive?Įxperiments showed that a trained dolphin could dive 1,640 feet (500 meters) deep. They do not only hunt fish, but also seals, penguins and squids. Photo: Chase Dekker/Shutterstock Behavior What Do Dolphins Eat?Ĭommon bottlenose dolphins eat 18-33 pounds (8-15 kg) fish per day. One to store food and the other to digest. They also pick up sound waves with their jaws and their head and transmit them to their inner ears. Dolphins have extremely small earholes, but they are said to have the best auditory sense of all animals. Yes, but they do not have auricles like us. It reaches a length of 20-26 feet (6-8 meters) and can weigh up to 6 tons. The biggest and heaviest dolphin is the orca, which is also named killer whale. It normally reaches a length of just 4 feet (1.2 meters) and a weight of 88 lb (40 kg). The smallest and lightest dolphin is Heaviside’s dolphin. Anatomy and Appearance The Biggest and the Smallest Did you know that the orca is a dolphin, too? We have a separate profile for the orca. ![]() When talking about dolphins, most people have a common bottlenose dolphin on their minds. They can be white, pearl-colored, rose, brown, grey, blue or black. which all vary in size, weight, behaviour and in appearance and color, too. There are about 40 different dolphin species. Up to 25 mph (40 km/h) (short distance), up to 7 mph (11 km/h) (long distance)ĭolphin are mammals that live in the ocean. Dolphin / Common Bottlenose Dolphin Facts Size
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