Grimpoteuthis, also known as Dumbo octopuses from the ear-like fins protruding from the top of their head-like bodies, resembling the ears of Walt Disney’s flying elephant Dumbo. They are bathyal creatures, living at extreme depths of 3,000 to 4,000 metres, with some living up to 7,000 metres below sea level, which is the deepest of any known octopus. 

Cutaneous horns, also known by the Latin name cornu cutaneum, are unusual keratinous skin tumors with the appearance of horns, or sometimes of wood or coral. They are usually small and localized, but can, in very rare cases be much larger. Although often benign, they can also be malignant or premalignant.