This is so big I think it deserves its own thread
http://www.springerlink.com/content/147031537857tx27/
"Detection of interspecies hybridisation in Chondrichthyes: hybrids and hybrid offspring between Australian (Carcharhinus tilstoni) and common (C. limbatus) blacktip shark found in an Australian fishery"
This could be a sign for a class reacting to the global warming. pretty amazing, huh? evolution in action.