Venomous sharks discovered 'living in the Thames' and breeding in shallow waters

dailystar.co.uk:

sharks have been discovered living and breeding in the Thames, 64 years after the river was declared biologically dead.The first 'health check' of the river since then has also revealed that seahorses, oysters and seals live in the Thames alongside the venomous Spurdog shark.Spurdogs swim in shoals and have two dorsal fins which release venom.

This venom can cause extreme discomfort and swelling in humans.According to the Zoological Society of London (ZSL) the Thames is now teeming with life and supports over 115 species of fish and 92 species of bird in its almost 600 hectares of saltmarsh.Tope, Starry Smoothhound and Spurdog sharks are using the river as a nursery as adults like pupping in shallow bays and estuaries.