DNA Sheds Light On Mysterious Type Ds

DNA analysis has shed light on the mysterious Type D orca found in subantarctic waters. It is thought that they diverged from other orca around 390,000 years ago, making this the second-oldest ecotype. 

http://www.livescience.com/37580-dna-sheds-light-on-rare-killer-whale.html

Type D Orca (Photo: Andrew Bishop)