
Dolphins are mammals; this means they nurse their babies with milk from the mother.
Dolphins can swim up to 260m below the surface of the ocean.
They can stay up to 15 minutes under water, but they cannot breathe under water.
They use a technique called echolocation to find food and navigate.
The dolphins live in groups (pods) formed by 10 to 12 individuals.
There are 36 different kinds of ocean dolphins and five species of river dolphins.
The largest dolphin is the "killer whale" (also known as Orca).
The most known dolphin is the "bottlenose dolphin".
Dolphins are warm-blooded.
They communicate using sounds and whistles.
They eat fish and squid.
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