Dumbo octopus
A Dumbo octopus swims toward the Pisces V submersible at the summit of the Cook seamount during a dive to the previously unexplored underwater volcano off the coast of Hawaii's Big Island on Sept. 6, 2016. Seamounts are hotspots for marine life because they carry nutrient-rich water upward from the sea floor. (AP Photo/Caleb Jones)
A Dumbo octopus swims toward the Pisces V submersible at the summit of the Cook seamount during a dive to the previously unexplored underwater volcano off the coast of Hawaii's Big Island on Sept. 6, 2016. Seamounts are hotspots for marine life because they carry nutrient-rich water upward from the sea floor. (AP Photo/Caleb Jones)
Given their resemblance to the title character of Disney’s 1941 film Dumbo, having a prominent ear-like fin which extends from the mantle above each eye, it is clear how this species got its name. It lives at least 13,100 feet (4,000 m) below the surface. The largest Dumbo octopus ever recorded was five feet 10 inches (1.8 m) long and weighed 13 pounds (5.9 kilograms). Life at these extreme depths requires the ability to live in very cold water and in the complete absence of sunlight. Dumbo octopuses move by slowly flapping their ear-like fins, and they use their arms to steer.