Seahorses discovered in the River Thames - life - 07 April 2008 - New Scientist

http://www.newscientist.com/channel/life/dn13610-seahorses-discovered-in-the-river-thames.html?feedId=online-news_rss20 --- Marine biologists believe seahorses could be breeding in the UK's River Thames as the water becomes cleaner. About five short-snouted seahorses (Hippocampus hippocampus) have been spotted during routine conservation surveys over the last year or so, leading scientists to think they have probably established a resident population.