Not reptile related but interesting reading on hybrid sharks in nature. Link has picture,

"Hybrid sharks have been discovered swimming in the waters off Australia's east coast. The finding may be driven by climate change, a research team says, suggesting such discoveries could be more common in the future."

"The hybridization is between the Australian black tip shark which favors tropical waters and the larger, common black tip shark, which favors sub-tropical and temperate waters."


http://futureoftech.msnbc.msn.com/_news/2012/01/03/9921974-australias-hybrid-shark-reveals-evolution-in-action

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