Apparently there is a colony of sea horses alive and well in the River Thames. The Zoological Society of London discovered the colony in 2006 but decided to keep quiet until legislation could be put in place to protect the seahorses. They live in the river’s estuary, between Essex and Kent.
This is seen by scientists as an indication that the thames is much cleaner than it was. Fifty years ago the Thames was declared biologically dead.
There are two types of sea-horse found off british water the short snouted and the long snouted. Those in the thames are short snouted.