north atlantic and adjacent
orca tail-slapping in vestfjorden， norway
at least 15，000 whales are estimated to inhabit the north atlantic in the northeast atlantic， two orca ecotypes have been proposed type 1 orcas consist of seven haplotypes and include herring-eating orcas of norway and iceland and mackerel-eating orcas of the north sea， as well as seal-eating orcas off norway type 2 orcas consist of two haplotypes， and mainly feed on baleen whales
in the mediterranean sea， orcas are considered “visitors“， likely from the north atlantic