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A survey has found hundreds of seals are living in the Thames. It is the first survey of its kind that has been conducted. It is thought the seals' presence is a bonus to London's marine life.
Funmi Olutoye reports:
There are around 500 harbour seals and 200 of the larger grey seals in the Thames Estuary, according to the Zoological Society of London (ZSL) said.
ZSL's conservation scientist Joanna Barker said:
More than 700 seals have been recorded in the Thames Estuary.
In the first ever count by air, land and sea, the Zoological Society of London found hundreds of grey and harbour seals along the Thames and in small creeks and rivers.