Authors of a recent Marine Biodiveristy Records publication describe a very special and surprising sighting of bottlenose dolphins in British Columbian waters: is this the first record of a long series to come?

Scientists studying dolphins dining off the California coastline have found that the marine food web is starting to look a little threadbare. The length of food chains in that web appears to have gotten shorter in response to environmental changes — such as those caused by El Niño events.

Unusually active marine mammals seen near Unalaska may actually be Pacific white-sided dolphins.

Pacific walruses are beaching on Northwest Alaska shores, peppered with bleeding skin legions that have been observed on dying ringed seals in Arctic Alaska, according to federal biologists.

Biologists are trying to determine what's ailing ringed seals that live off Alaska's Arctic coast. Scores of seals stranded on beaches this summer appeared to have skin lesions, and dozens have died.