Image for Partner for life

Partner for life

Duration: 01:05

Male angler fish are just a tenth of the size of the females. Their purpose in life is to find a mate somewhere in the darkness. The female releases a scent into the water which the males can detect. Once he's found a female, the male attaches himself permanently to the her with his teeth. Over the next few days the male fuses to the female, her blood circulating around him to keep him alive. The female then benefits from a constant supply of sperm, which would ordinarily be very difficult to find in the vastness of the deep ocean.

Available since: Wed 26 Jan 2011

This clip is from

The Blue Planet The Deep

2/8 David Attenborough looks at the strange creatures that live in the depths of the ocean.

First broadcast: 19 Sep 2001

Image for The Deep Not currently available on BBC iPlayer

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