When dolphins take a breath, they replace 90% of the air in their lungs with fresh air.

By Karin Lehnardt, Senior Writer. The reason is that five of their seven vertebrae are not fused together.A bottlenose dolphin can jump up to 20 feet (6 meters) high in the air.Dolphins usually swim at a speed of 5 to 11 kilometers per hour.The recorded fastest speed of a bottlenose dolphin was 29.3 km per hour (18.2 miles per hour).It is a small-sized dolphin found in tropical sea waters all around the world.The Spinner dolphin is well-known for its acrobatic exhibition, in which it rotates or spins with its longitudinal axis as it jumps in the air.It is the known smallest and rarest dolphin subspecies in the world.Maui dolphin is found only in the sea of the western region of North Island (Te Ika-a-Maui), New Zealand.They have up to 50 kg of body weight with about 1.7 meters of body length.Their estimated latest population is 63 individuals of 1 year age.It inhabits the tropical and temperate waters of all around the oceans of the world.The adult individuals have body size with up to 2.6 meters in length and body weight of 160 kg.Striped dolphins are very social and travel in large groups of 25 to 100.Striped dolphin is also one of the most extensively studied dolphin species.) They are friendly towards humans and are very playful in nature.Dolphins are also happy animals that have been observed to possess higher intellect than most of the other animals. So that they inhale and exhale quickly at the water surface.Dolphins have the ability to hold their breath for 10 to 12 minutes.Dolphins need just about 0.3 seconds to exhale and inhale.They regularly dive at a depth of 3 to 46 meters.

Like humans, deep diving can also exert negative physiological impacts on dolphins.Dolphins have several thermoregulatory strategies, due to which their body temperature remains constant. Dolphins tail propels their body in water to move forward, upward, and downward within the water. Check out our awesome range of animal facts for kids and learn some fun trivia about our friends in the animal kingdom. Species of small size like Tucuxi have 11 to 12 months gestation period while the largest species Orca have up to 17 months.Mother fed the newborns with her milk for 18 months to 2 years, depending on the species.The average lifespan of dolphins is up to 30 years. Dolphins are very intelligent and have a special relationship with humans. In order to view their surroundings, they will spy-hop. 1) Bottlenose dolphins are marine mammals that live in tropical and temperate oceans (oceans with mild temperatures) around the world. From rivers to oceans, dolphins can be found all over the world and in nearly all aquatic environments. 69 Interesting Dolphin Facts. They are ready to give birth they will distance themselves from the rest of the pod.

They make sounds through the airflow.When a dolphin exhales and then inhale air at the water surface, the blowhole close tightly at the time when they re-enter to water.The inhaled air moves through the nasal passages, and in the way of airflow to the lungs, sounds are produced through the air sacs in their head when air flows through it.Dolphins have the capability to produce sounds of extremely higher frequency of 120 kHz.Dolphins navigate, protect themselves, locate prey and hunt through echolocation.The time, intensity, and pitch of echoes provide information to dolphins about the distance, direction, size, position, and composition of objects.Even in murky waters and in dark, dolphins do not need the sense of vision to communicate and to locate prey and predators.Dolphins communicate through a wide range of sounds.Through the first year of life, each dolphin develops a specific and distinctive sound, which is unique for every individual.This unique sound is like their name through which they identify each other.Besides sounds, dolphins also communicate through nonverbal gestures, body language, and touch.Unlike humans and other land-mammals, dolphins do not have external ears.They receive sound waves through their throat, which passes to the inner ear through fat-filled cavities.Dolphins have an isolated hearing system from the skull, which enables them of greater underwater directional hearing.They have the ability to listen to a wide range of sound frequencies, from 20 Hz to 150 kHz.Out of the water, a dolphin can survive for several hours, if it remains wet in a suitable temperature.A dolphin is a mammal and has lungs for respiration.The breathing organ of dolphins is the blowhole located at the top of their head.A muscular flap covers the blowhole as a watertight seal.When dolphins are underwater, they hold their breath.Just before reaching the water surface, dolphins contract their muscular flaps and open the blowhole to start exhalation.They then inhale quickly at the water surface and close the blowhole through relaxing the muscular flaps.Dolphins exchange more than 80% of its lung air during a single breath.The exhalation and inhalation process takes place only in about 0.3 seconds.The inhaled air recycles within their respiratory system, due to which dolphins can hold their breath underwater for 10 to 12 minutes.But unlike humans, they never fall completely asleep and can not be caught napping, especially in the wild.In dolphins, half part of their brain sleeps while the other half stays awake and alert.

Last Updated on September 30, 2019. They also display the most elaborate acoustic social abilities, from whistles and squeaks to groans and yelps. The pod members take care of a pregnant female and her calf after giving birth.