interesting dolphin facts for kids
Marine dolphins sleep with one eye open and the other eye closed. Dolphins has to be conscious to breathe and two parts of their brain take turns to rest. When the left hemisphere rests, the right eye of the dolphin is closed and when the right hemisphere rests the left eye is closed.
interesting dolphin facts for kids
Salt water dolphins live in the seas and oceans, but they do not drink water as the sea water is too salty and drinking salt water can make them sick and can even kill them! Dolphins do need water to survive and they get most of their water from their food (mainly fish and squid). They can also make water by burning their fat
interesting dolphin facts for kids
Dolphins, like humans, have sex even when they are not in heat which is unusual in the animal kingdom. Dolphins are one of the three species that engage in sex for pleasure (humans and bonobos are the other two)

interesting bottlenose dolphin facts for kids
Bottlenose dolphins, like humans, have sex even when they are not in heat which is unusual in the animal kingdom.
interesting dolphin facts for kids
Dolphin have about 100 teeth that they use for grasping food.
interesting dolphin facts for kids
Dolphins cannot chew their food as they have no jaw muscles for chewing. They have to swallow the whole fish
interesting dolphin facts for kids
Just a tablespoon of water in a dolphin’s lung could drown it.
interesting dolphin facts for kids
A mature Dolphin will give birth every 2 to 3 years and have as many as eight birth cycles in a lifetime.
interesting dolphin facts for kids
Dolphins give live birth, as mammals do. The gestation period can range anywhere from seven to seventeen months depending on what type of dolphin it is. For most mammals, including humans, babies are typically born head first. But, a dolphin calf is born tail-first to prevent drowning. After the mother breaks the umbilical cord by swiftly swimming away, she immediately returns to her baby and take it to the surface to breathe. The mother nurses the calf with milk until the baby is old enough to eat typical dolphin food, such as fish and squid. The baby dolphin travels by its mother's side for up to three years before making its own way
interesting dolphin facts for kids
Unlike a fish, which moves its tail from side to side, a dolphin swims by moving its tail up and down.
interesting dolphin facts for kids
Dolphin carries more oxygen in its blood than a fish and can swim longer than a fish and hence dolphin is a better swimmer than a fish
interesting dolphin facts for kids
The life expectancy of a Dolphin differs from species to species and even from region to region. It varies from 10 to 70 years. The bottlenose dolphin can live over 40 years, and the orca can live to be 70
interesting dolphin facts for kids
All of the fun squeaks and whistles you hear a dolphin make actually come out of their blowholes! They do not make sounds with their mouths.
interesting dolphin facts for kids
Dolphins evolved from land animals. The land ancestor of the dolphin lived about 50 million years ago and looked a little like a wolf. This animal hunted in shallow waters and by and by adapted itself to life in water: the forelegs became flippers, the hind legs disappeared and the fluke evolved, the fur disappeared and the nostrils moved to the top of the head.
interesting dolphin facts for kids
Dolphins, porpoises, and whales are called cetaceans. A cetacean is a creature belonging to a group of water living mammals that have no hind limbs and a blowhole for breathing.
interesting dolphin facts for kids
A group of dolphins is called a pod. Pods can be as small as two dolphins and as large as hundreds of dolphins.
interesting dolphin facts for kids
Dolphins and whales have a fin on their back and it is called 'dorsal fin'
interesting dolphin facts for kids
A female dolphin, whale or porpoise is called a “cow”. A male dolphin, whale or porpoise is called a “bull”. A baby is called a “calf”.
interesting dolphin facts for kids
Orca is the largest member of the dolphin family. Orca is also known as 'killer whale' because it separates baby whales from their pod and eat them! Orcas also eat other dolphin species.
interesting dolphin facts for kids
Dolphins use 'echolocation' to navigate. Dolphins emit high-pitched clicks then use the echos that bounce-back from objects in the water to determine the location of those objects. With their 'echolocation', dolphins can distinguish between types of fish the same size, between aluminum and brass, and between a steel ball that is 2½ in diameter and one that is 2¼ in diameter
interesting dolphin facts for kids
Unlike humans, dolphins cannot breathe through their mouth; they only breathe throught their blowholes.
interesting dolphin facts for kids
Most people mistakenly identify porpoises as dolphins. Porpoises look like small dolphins but they have plumper bodies. Porpoises also have a blunt snout rather than a beak like profile. Porpoises have spade-shaped teeth and blunt rounded faces. Dolphins have teeth shaped like rounded cones set in jaws that extend in a snout or beak.
interesting dolphin facts for kids
All dolphins are in fact toothed whales. There are 32 species of marine dolphins, four types of river dolphins, and six types of porpoises. The best known species are the common dolphin (Delphinus delphis) and the bottle-nosed dolphin (Tursiops truncatus)
interesting dolphin facts for kids
Most dolphins are about 6 feet long, but the bottle-nose dolphin can be over 9 feet long. The smallest dolphin is a bufeo, which is about 3 feet 9 inches. The smallest dolphin is the Hector or Maui Dolphin
interesting dolphin facts for kids
The deepest a Dolphin has been recorded to dive was 300 meters (about 1000 feet). This was accomplished by Tuffy, a US Navy trained Dolphin. Most Dolphins do not, however, spend very much time at that depth. In fact, many dolphins spend the majority of their time in less than 2 meters (about 7 feet) of water.
interesting dolphin facts for kids
Like many of their mammal relatives, dolphins shed skin sheds constantly. This also gets rid of any algae and bacteria that tend to stick to them.
interesting dolphin facts for kids
Dolphins need to eat about 5% their body weight every single day.
interesting dolphin facts for kids
A dolphin can produce whistles for communication and clicks for sonar at the same time, which would be like a human speaking in two voices, with two different pitches, holding two different conversations.
interesting dolphin facts for kids
The eyes of a dolphin produce “dolphin tears,” a slippery secretion which protects the eye against foreign objects and infection and reduces friction between the surface of the eye and surrounding sea water. Marine dolphins see quite well both below and above the water.
interesting dolphin facts for kids
Dolphins don’t have a sense of smell, but they do have a sense of taste and can distinguish between sweet, sour, bitter, and salty tastes.
interesting dolphin facts for kids
The blowhole is an evolved nose that has moved upward to the top of the dolphin’s head. Most mammals have two nostrils. One of the nostrils of dolphins evolved into their echolocation system (the sensing system in which they make and recieve high-pitched sounds in order to orient themselves, catch prey, and communicate), leaving them with only one blowhole. Baleen whales (like humpbacks, blue whales, gray whales, bowhead whales, etc.) have two blowholes, located side by side as they do not use echolocation
interesting dolphin facts for kids
The dolphin's two mammary glands open into a pair of sacs on either side of the anal opening, and the calf's beak fits into the openings on the sacs. The nipple is grasped between the upper jaw and the tongue, and muscular contractions by the mother literally squirt mil into the calf's mouth. Nursing may continue for as long as 12 to 18 months after birth
interesting dolphin facts for kids
While the brains of most mammals have a relatively smooth surface, the brains of humans are extremely convoluted with many folds. The dolphin brain is even more “folded” than humans and was this way millions of years before the first appearance of humans
interesting dolphin facts for kids
The narwhal dolphin has a large ivory tusk (like a unicorn)
interesting dolphin facts for kids
Killing a dolphin in ancient Greece was considered sacrilegious and was punishable by death. The Greeks called them hieros ichthys “sacred fish,” and the sun god, Apollo, assumed the form of a dolphin when he founded his oracle at Delphi at Mount Parnassus.
interesting dolphin facts for kids
The term “dolphin” is from the Greek delphis which is related to delphys (such as the Delphic Oracle) meaning “womb”
interesting dolphin facts for kids
Marine dolphins generally cannot survive in fresh water environments. Because of the differing bouyancies, marine dolphins find it harder to move in fresh water; they often become exhausted and eventually begin to lose their skin.
interesting dolphin facts for kids
Dolphins normally travel at speeds of between 6 and 8 km/hr, as their motion is most efficient at these speeds. At higher speeds, dolphins tend to jump clear out of the water. This actually helps the Dolphin save energy, as the air provides a lot less resistance than the water. It is estimated that dolphins can reach speed of up to 30 km/hr, but that is only in short bursts.
interesting dolphin facts for kids
Dolphins are warm-blooded and their internal temperature is around 36 degrees Celcius. To conserve this temperature they are surrounded by a thick layer of fat called "blubber" just below the skin.
interesting dolphin facts for kids
Dolphins can stay up to 15 minutes under water although they usually stay only a few minutes diving before they go up to breathe.
interesting dolphin facts for kids
Pink, blue or albino, the Amazon river dolphin is the most distinctive of the river dolphin species. It has a ridge along its back rather than a dorsal fin and its fat, heavy body is surprisingly flexible. Paddle-like flippers which move in a circular motion provide exceptional manoeuvrability, making up for a lack of speed. The Amazon and Orinoco river basins provide all the food in its highly diverse diet, including at least 40 different species of fish. It relies on echolocation to find prey in the muddy waters. Males can reach two and a half metres in length, making them the largest of the river dolphins. This is unusual as in the other four species, the females are the larger.
interesting dolphin facts for kids
One species of dolphin—the Indus river dolphin—will only sleep a few seconds at a time because it has to dodge dangerous debris in the water where it lives.
interesting dolphin facts for kids
Dolphins play with members of their own pods as well as members of other pods. They will also play with masses of seaweed and even turtles! Dolphins also known to play with humans
interesting dolphin facts for kids
Marine Dolphins see quite well both below and above the water
interesting dolphin facts for kids
The Yangtse dolphin, or baiji is one of the world's rarest mammals probably less than 300 survive
interesting dolphin facts for kids
Dolphins have two stomachs - one for storing food and the other for digesting
interesting dolphin facts for kids
Dolphins are extremely and almost constantly vocal. They are capable of two kinds of sounds. A specialized mechanism in the nasal passages just below the blow-hole enables them to emit short, pulse-type sounds. These sounds, called clicks, can be produced in such rapid succession as to sound like a buzz or even a duck like quack. The clicks are used as a form of sonar, in which echoes of sounds from surrounding objects enable the animals to detect obstacles, other dolphins, fish, and even tiny bits of matter in the water. Deeper in the respiratory system--presumably in the larynx--dolphins produce another type of sound: a high pitched whistle of squeal, which is capable of rapid pitch changes. The whistles differ from the clicks in being essentially single tones. Apparently the dolphin used the whistles to communicate a particular emotional state and thus influence the behavior of other dolphins. Typically, the squeals denote alarm or sexual excitement.
interesting dolphin facts for kids
The only position of copulation for dolphins is face to face
interesting dolphin facts for kids
This varies with the type of dolphin. Bottlenose Dolphins can hold their breath for about 7 minutes, Belugas for about 12 minutes and Orcas for 20 minutes.