Sperm Whales are the largest carnivores in the world. Blue Whales could be considered carnivores, but an apex predator eats self-functioning prey. Sperm Whales eat huge prey. They are eating the largest cephalopods on the planet. Sperm Whales kill Giant Squid and Colossal Squid. We know because a lot of Sperm Whales have been found with circle-shaped scars on their bodies made by the suction cups of Giant Squid and slashes made by the hooks of a Colossal Squid.