Zoological Society of London carries out most comprehensive survey since 1950s
Seahorses, eels, seals and sharks are living in the tidal Thames, according to the most comprehensive analysis of the waterway since it was declared biologically dead in the 1950s.
But scientists from the Zoological Society of London (ZSL), who carried out the work, warn that the 95 miles of the tidal Thames is suffering from rising nitrate levels as a result of industrial runoff and sewage discharges. Water levels and temperature are also rising as a result of global heating.
