One of the largest of all toothed whales was spotted in the Monterey Bay this month….a place where one hasn’t been spotted for 5 years. The male Sperm Whale has actually been seen several times by different people, always in fairly deep waters (fairly close to the shore). Male Sperm Whales can grow to be 40-60 feet long, and their primary diet is squid. Sperm Whales are on the Endangered Species List.