The sperm whale (physeter macrocephalus) is the largest of the toothed whales, and has a life expectancy of about 70 years. A mature whale has few natural predators. It is the deepest diving mammal, reaching depths of three kilometres as it searches for prey. Females give birth to between 7-10 calves over their lifetime, each one gestated for 16 months. Mothers care for the calves for more than a decade. The species is protected by law, and is currently listed as vulnerable by the International Union for Conservation of Nature.
A surprise visitor to Oban Bay, this sperm whale was possibly lost. It is shown with Kerrera, Eilean nan Gamhna & Mull in the background.