The largest marine mammal has been recently spotted swimming along the warm waters of the Maldives. Quite a rare sight, the blue whales are known to be an endangered species due to many human conflicts where they have been poached and killed for various reasons. Blue whales were poached during the 20th century and was the main whaling target, which led to them, being listed on the endangered species list. Blue whales can grow to the length of 80 -100 feet and are currently believed to be the largest animal on earth. While on your whale watching tour, blue whale sightings might be somewhat low, but do keep a keen eye out for these majestic giants of the sea.