- Info:The Fin Whale is another one of the whales you can find when take one of our Los Angeles Whale Watching tours. Also known as the Razorback Whale is one of the largest animals on the planet. Other than the Blue Whale, no other animal can match the size of a Fin Whale. Fin Whales have been known to reach lengths of up to 90 feet and though one has never been weighed, it is estimated that they can weigh up to 77 tons. Fin Whales, even with their incredible size, have the appearance of being slender due their incredible lengths. They have a brownish gray color with a pale underside. Fin whales are also noticeable by their long dorsal fin which can be seen after the spout. When the Fin Whale surfaces, it will take multiple breaths and remain for 60 to 90 seconds. Their spouts can be up to 18 feet in height. They will then dive down to about 250 meters where they will stay for 10 to 15 minutes before resurfacing. Fin Whales are also very nimble and have been known to completely launch themselves out of the water. Southern California Fin Whale Population Like many other whales, fin whale populations were at one point decimated by whaling. Over a 75 year period, about three quarters of a million Fin Whales were killed by whalers, leaving the current population at about 35,000. Though whaling moratoriums have been passed, there are still a few countries that continue the practice. Passing ships and noise pollutions are still another enemy of the Fin Whale and continue to threaten their prosperity.