Rob Deaville (C) and Matt Perkins (L) from London Zoo take samples from the carcass of a Sperm whale on the beach in Hunstanton, Britain February 5, 2016. A sixth sperm whale died on a British beach on Thursday, the latest of two dozen of the bus-length mammals to wash ashore and perish in shallow waters on the coastline of Europe's North Sea. REUTERS/Alan Walter