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Lesser bobtail squid underwater in the Saguenay Fjord in Canada

$Bigfin Reef Squids are easy to distinguish from other squids in that they possess thick and muscular oval fins that extend around almost the entire mantle. Because of these fins, bigfin reef squids are sometimes mistaken for cuttlefish. The bigfin reef squid is the most widespread species in the genus Sepioteuthis. It is found in temperate and tropical regions of the Indian Ocean and the Western Pacific Ocean.\nAt night, when the Bigfin Reef Squids are most active, they are commonly found in shallow areas from 0-100m around reefs, sea grass beds, sandy bottoms, or rocky shorelines. They surface at night, as it is less likely to be detected by predators. During the day, they generally move to deeper waters or near any form of cover, such as floating driftwood, reefs, rocks, or grasses.\nSquids have speedy colour-changing abilities as their pigment cells, the chromatophores, rapidly change size and colour and the visual effect is enhanced by light reflecting cells, the iridocytes. They can shoot ink (dark melanin pigment) to confuse predators and aide in escapes. \nLembeh Strait, Indonesia\n1°28'47.196 N 125°14'12.42 E at 16m depth by night$

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.

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

A shallow coral reef with one Pharoah Cuttlefish (Sepia pharaonis) swimming alone. These Cephalopod are able to change skin colour in an instant to blend in and camouflage with their surroundings. The animal is splaying its tentacles in defensive behavior. Image taken whilst scuba diving in Phi Phi island archipelago, Krabi province, which is one of Thailand’s top travel destinations. Sony mirrorless camera in underwater housing with dual Inon Z330 strobes used.

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

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.

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

Squid are cephalopods of the order Teuthida

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

Common octopus attacking camera. Mediterranean sea.

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

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

A common cuttlefish (Sepia officinalis) in the Calanques National Park in the South of France.

Bigfin reef squid (Sepioteuthis lessoniana) under water

Common cuttlefish in Adriatic Sea near Hvar Island

Grey octopus sitting on top of the hand of a fisherman with green t-shirt at the harbor, legs of the octopus hanging down, lots of ships and buildings in the background

squid swimming underwater in the ocean floor

$Veined Octopus or Coconut Octopus Amphioctopus marginatus (ex. Octopus marginatus) occurs in temperate and tropical waters of the Indo-West Pacific in a depth range from 0 to 190 m, max. length 30cm, mantle length 10cm, max. weigth 400g. \n\nThe Veined Octopus can bury itself in sand or mud. They also exhibit a curious behaviour adaption of using discarded clam shells and halves of coconut shells for protection. Sandy and muddy habitats the octopus inhabits leave itself little protection from passing predators. \n\nDiscarded halves of coconut shells are common in waters near human settlements throughout Indonesia. When two halves fit together, the halves make a perfect refuge difficult for predators to open. \n\nAmphioctopus marginatus lays up to 100 000 small eggs which hatch into tiny planktonic young. These young are carried in ocean currents, accounting for its wide distribution. \n\nThis specimen was encountered in the Lembeh Strait, Indonesia \n1°29'32.88 N 125°14'12.9 E at 17m depth by night$

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

Discarded used plastic bottle sitting on the seabed.

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