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Behold the mysterious elegance of an octopus as it gracefully navigates the ocean depths, its tentacles dancing in the currents, a symbol of intelligence and adaptability.

$Bigfin Reef Squids are easy to distinguish from other squids in that they possess thick and muscular oval fins that extend around almost the entire mantle. Because of these fins, bigfin reef squids are sometimes mistaken for cuttlefish. The bigfin reef squid is the most widespread species in the genus Sepioteuthis. It is found in temperate and tropical regions of the Indian Ocean and the Western Pacific Ocean.\nAt night, when the Bigfin Reef Squids are most active, they are commonly found in shallow areas from 0-100m around reefs, sea grass beds, sandy bottoms, or rocky shorelines. They surface at night, as it is less likely to be detected by predators. During the day, they generally move to deeper waters or near any form of cover, such as floating driftwood, reefs, rocks, or grasses.\nSquids have speedy colour-changing abilities as their pigment cells, the chromatophores, rapidly change size and colour and the visual effect is enhanced by light reflecting cells, the iridocytes. They can shoot ink (dark melanin pigment) to confuse predators and aide in escapes. \nThis specimen was encountered in the Lembeh Strait, Indonesia\n1°28'8.916 N 125°14'39.102 E at 16m depth$

Lesser bobtail squid underwater in the Saguenay Fjord in Canada

The common cuttlefish or European common cuttlefish is one of the largest and best-known cuttlefish species. They are a migratory species that spend the summer and spring inshore for spawning and then move to depths of 100–200 metres during autumn and winter.

Extreme close-up of an octopus sleeping with closed eyes. Blurred tentacles in the foreground.

An amazing cuttlefish among soft coral. Picture from Puerto Galera, Philippines. Sandy bottom and turquoise water in the background

Octopus is resting on the sand and is camouflaged to blend in with the coral. The background consists of coral and rocks.

Pharaoh Cuttlefish (Sepia pharaonis) expands and contracts muscle rings around sac colors in order to show different colors. It is typically consumed as dried, shredded cuttlefish, popular snack food

$Bigfin Reef Squids are easy to distinguish from other squids in that they possess thick and muscular oval fins that extend around almost the entire mantle. Because of these fins, bigfin reef squids are sometimes mistaken for cuttlefish. The bigfin reef squid is the most widespread species in the genus Sepioteuthis. It is found in temperate and tropical regions of the Indian Ocean and the Western Pacific Ocean.\nAt night, when the Bigfin Reef Squids are most active, they are commonly found in shallow areas from 0-100m around reefs, sea grass beds, sandy bottoms, or rocky shorelines. They surface at night, as it is less likely to be detected by predators. During the day, they generally move to deeper waters or near any form of cover, such as floating driftwood, reefs, rocks, or grasses.\nSquids have speedy colour-changing abilities as their pigment cells, the chromatophores, rapidly change size and colour and the visual effect is enhanced by light reflecting cells, the iridocytes. They can shoot ink (dark melanin pigment) to confuse predators and aide in escapes. \nThis specimen laid egg capsules on a boie rope. \nLembeh Strait, Indonesia\n1°28'8.9165 N 125°14'39.1048 E at 16m depth$

Common octopus attacking camera. Mediterranean sea.

Extreme close up of Octopus eye and skin texture, macro underwater photography. Australia.

Sea life. Octopus eye- Cephalopod. Underwater abstract. Close-up

Bigfin reef squid (Sepioteuthis lessoniana) under water

$Bigfin Reef Squids are easy to distinguish from other squids in that they possess thick and muscular oval fins that extend around almost the entire mantle. Because of these fins, bigfin reef squids are sometimes mistaken for cuttlefish. The bigfin reef squid is the most widespread species in the genus Sepioteuthis. It is found in temperate and tropical regions of the Indian Ocean and the Western Pacific Ocean.\nAt night, when the Bigfin Reef Squids are most active, they are commonly found in shallow areas from 0-100m around reefs, sea grass beds, sandy bottoms, or rocky shorelines. They surface at night, as it is less likely to be detected by predators. During the day, they generally move to deeper waters or near any form of cover, such as floating driftwood, reefs, rocks, or grasses.\nSquids have speedy colour-changing abilities as their pigment cells, the chromatophores, rapidly change size and colour and the visual effect is enhanced by light reflecting cells, the iridocytes. They can shoot ink (dark melanin pigment) to confuse predators and aide in escapes. \nTriton Bay, West Papua Province, Indonesia, 3°56'17.7941 S 134°7'10.2802 E at 1m depth$

Common cuttlefish in Adriatic Sea near Hvar Island

A common octopus (Octopus vulgaris) in La Ciotat in the Calanque National Park in the South of France.

Sea life. Octopus, Cephalopod on Sandy bottom. Underwater abstract. Close-up

$Long Arm Octopus Macrotritopus sp. is pelagic in the larval phase. As adult he lives on sandy or muddy surfaces. \n\nWhen you think of a long-armed octopus, you think of a meter-long animal. It is the proportions, the small head (6cm) compared to the arms (15cm), that make this animal appear so long-armed. \nThe Long Arm Octopus found in the Indo-Pacific region, including the Lembeh Strait, may represent an undescribed species within this genus. \nUnlike some of more robust cephalopods, the Long Arm Octopus are normally quite shy. They are often found resting inside a small hole in the sand with only their head sticking out.\nThis specimen was encountered in the Lembeh Strait, Indonesia \n1°28'56.394 N 125°15'15.588 E at 9m depth$

Squid are cephalopods of the order Teuthida

Discarded used plastic bottle sitting on the seabed.

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