BBC: Warmer seas could be responsible for a change in the type of dolphins spotted off the coast of the North East of England, a survey has suggested. The North East Cetacean Project found an increase in sightings of common, bottlenose and Risso’s dolphins – species associated with warmer waters. There have also been fewer sightings of white-beaked dolphin and harbour porpoise, which prefer colder water. It is thought the distribution shift is due to increasing sea …