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How long do dolphins live?

How long do dolphins live?

Bottlenose dolphin with calf

Dolphins can live for a very long time and females tend to live longer than males. Female bottlenose dolphins have been known to live for more than 60 years and dolphins up to 48 years old have given birth. The oldest known dolphin is a bottlenose dolphin named Nicklo by researchers studying dolphins in Sarasota…

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How do dolphins give birth?

Bottlenose dolphin with calf

Dolphin pregnancies last between 10 months (harbour porpoise) and 18 months (orcas) depending on the species. Bottlenose dolphin pregnancies are somewhere in the middle lasting about 12 months, a little longer than human pregnancies which last 9 months. Dolphins give birth to a single baby; the baby is usually born tail first (unlike most mammals)…

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What is a group of dolphins called?

Pod of Port River dolphins swimming close to the surface

A group of dolphins is called a pod. Dolphins are social mammals that interact with one another, swim together, protect each other, and hunt for food as a team. Pod life plays a very important role in protecting dolphins from predators such as sharks. Most pods contain anywhere from 2 – 30 dolphins depending on the species and the situation, however there are occasions when pods gather…

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How many teeth do dolphins have?

Dolphin eating a salmon

Most dolphins have equal-sized conical shaped teeth in both upper and lower jaws (porpoises’ teeth are spade-shaped) perfect for grasping fish and squid. Like most mammals, newborn dolphin teeth are still embedded in the gums. Their teeth will start erupting in the first 5 weeks of life. Dolphins have one set of teeth to last…

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Where do dolphins live?

Pod of dolphins in Moray Firth

Dolphins live in the world’s seas and oceans and in some rivers too. Some dolphin species prefer to live in coastal areas, others like shallow water which are located further out to sea. Finally, there are some species that travel the high seas far from land. Orcas and long-finned pilot whales can be found in…

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How are dolphins different from fish?

Bottlenose dolphins leaping

Dolphins vary from fish in a number of ways. Both dolphins and fish have adapted to live their whole lives in the water, both have streamlined bodies and fins. But, dolphins are mammals and so they need regularly visit the surface to breathe air to survive, otherwise they would drown. Fish on the other hand…

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How many species of dolphins are there?

Pod of orcas in Far East Russia

Currently there are 49 dolphin and porpoise species which are grouped into six families: the oceanic dolphin family is by far the largest with 38 members; the porpoise family has seven members; and there are four river dolphin families, each containing just one species. However, classification is not an exact science and as more information…

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Do whales and dolphins grieve for their dead?

Scientists have now observed seven species of whales and dolphins mourn their dead pod mates and relatives in their own ways. For the very first time, a team of researchers recently reported seeing dead calves or juveniles being carried by adult Indo-Pacific bottlenose dolphins, spinner dolphins, orcas, Australian humpback dolphins and sperm whales, in some instances…

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How do dolphins sleep?

Short-beaked common dolphin

Dolphins sleep in a very different way to the way we humans do. Humans have prolonged periods of unconscious sleep and we are not aware of our surroundings for periods of time while sleeping. Humans have a breathing reflex and when we sleep or become unconscious, we continue to breathe automatically. Do whales and dolphins…

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How do dolphins communicate?

A group of Commerson's dolphins

Communication amongst whales and dolphins is achieved in several ways. They create sounds, make physical contact and use body language. Large whales can communicate over huge distances (across entire ocean basins) using very low frequencies. Dolphins and porpoises however, usually use higher frequencies, which limits the distance their sounds can travel. In general, dolphins make…

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