Seahorses in London

Little seahorses have been found in the Thames river in England as far upstream as London, according to this article in National Geographic. The Thames is an ecological recovery success story. Subjected to decades of pollution, the Thames was declared biologically dead in the 1950s. Serious efforts to clean up the river began about twenty years ago and have had marvelous results. The river is the cleanest it's been since pre-industrial times and a number of extirpated species are reclaiming their old stomping grounds. In addition to the seahorses, brown trout, Atlantic salmon, dolphins, seals and one lost whale have been spotted in the Thames in recent years.