Two frogs mating surrounded by eggs

Spawning

Spawning animals deposit a mass of eggs and sperm in water, where they meet and are fertilised. Even when the male and female animals are in close proximity, such as a male frog grasping the female, the eggs are fertilised outside the female's body. Some animals, such as coral and many fish, synchronise their spawning so that millions of eggs are released at once in often quite impressive events.

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Video collections

Take a trip through the natural world with our themed collections of video clips from the natural history archive.