What are the characteristics of false killer whales that were stranded in Tasmania?

False killer whales, recently stranded on an isolated beach along Tasmania's northwest coast (about 400 km from Hobart), are substantial marine mammals that can grow up to 20ft in length and weigh as much as 1361 kilograms. Their physical appearance closely resembles that of orcas, which explains their name 'false killer whales' despite being a species of dolphins. The recent stranding marks the first mass stranding of this species in Tasmania in 50 years, with over 150 individuals involved in this significant marine wildlife event.