Sepiida, commonly known as cuttlefish, are marine animals known for their unique W-shaped pupils, ability to change skin color and texture, eight arms, and two tentacles. They inhabit shallow coastal waters and are renowned for their intelligence, complex communication, and dynamic camouflage abilities.

Sepiida, commonly known as cuttlefish, are found in temperate and tropical ocean waters. Their geographical distribution includes the eastern Atlantic Ocean, the Mediterranean Sea, and the Indo-Pacific region, extending from South Africa to Japan and Australia. They are not typically found in the Americas, as they are absent from the Western Atlantic and the entirety of the Pacific coast of the Americas.

Cuttlefish inhabit marine environments, predominantly in coastal waters. They are usually found in shallow waters up to about 200 meters deep, although some species can be found at greater depths. They prefer sandy or muddy substrates where they can easily camouflage themselves. The water temperature in these regions typically ranges from temperate to tropical, corresponding to their wider distribution across the globe.

Cuttlefish occupy a niche as both predators and prey within their ecosystems. They are primarily active hunters, using their impressive camouflage abilities and rapid movement to capture prey such as small fish, crabs, and other mollusks. Cuttlefish are also a crucial part of the food web, serving as prey for larger marine animals such as sharks and dolphins. Their ability to change color and texture helps them evade predators and communicate with other cuttlefish.