Due to their otherworldly appearance and unique characteristics, people often refer to cuttlefish as alien species. Cuttlefish possess large, bulging eyes, undulating tentacles, and a remarkable ability to rapidly change colors and patterns on their skin. These features and their intelligence and complex behaviors give them a mysterious aura.

Their peculiar body structure, including the internal cuttlebone and the ability to rapidly propel themselves using a jet of water, further adds to their alien-like qualities. Thus, comparing to alien species is a way for people to describe cuttlefish’s fascinating and unconventional nature.
Cuttlefish are fascinating dino fish. So ancient.
Cuttlefish are indeed fascinating creatures!
Alien indeed. Especially at night, when they come out of nowhere.
(Nice shot.)
They are interesting looking creatures. Terrific photos.