OPB on Instagram: "A 46-foot-long fin whale washed ashore in Clatsop County on the Oregon coast Saturday morning. Officials from the Seaside Aquarium said the whale had already been dead for some time before washing up on the beach. Fin whales are one of the largest whale species in the world, known for their incredibly long and slender bodies. Aquarium officials said that only the blue whale - the largest mammal on earth - is bigger. A cause of death for the whale was not immediately identified