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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.

A large squid close-up, swimming in the green aquarium fish tank illuminated with the glowing orange bright light on the street fish market in Daegu City, South Korea

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

Lesser bobtail squid underwater in the Saguenay Fjord in Canada

Beautiful close up of Octopus vulagris in the French Riviera

Cuttlefish or cuttles are marine molluscs of the order Sepiida. They belong to the class Cephalopoda, which also includes squid, octopuses, and nautiluses. Cuttlefish have a unique internal shell, the cuttlebone.

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

$The Pharaoh Cuttlefish Sepia pharaonis lives in warm water (30°C) and is fast growing. They mate and spawn at 110 days and their life span is 240 days. They lay about 1500 eggs which take 14 days to develop at 28°C. Males are larger than females and most are larger than 1 kg. In contrary to a squid's tail fins, cuttlefish have got a fin fringe running around all of the body side. A cuttlefish moves by undulating that fringe. Additionally, the cuttlefish can use the rocket propulsion typical of all cephalopods: Water is pressed from the pallial (mantle) cavity through the hyponome or siphon (a muscular tube), which is also used to direct the propulsion. So the cuttlefish is driven backward, which it uses mainly to evade an enemy, especially on short distances. This specimen is over a sponge in the Triton Bay, Indonesia, \n43°54'41.052 S 134°7'18.204 E at 15m depth$

Big Blue Octopus - Octopus cyanea swims in the open sea. Underwater world of Bali.

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

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

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

$The Indo-Pacific reef squid, also known by its scientific name Sepioteuthis lessoniana, is a species of cephalopod mollusk belonging to the family Loliginidae. It is commonly found in the tropical and subtropical waters of the Indo-Pacific region, including the Indian Ocean, the Red Sea, and the western Pacific Ocean.\n\nThese squids have a unique and fascinating appearance. They have a torpedo-shaped body with a mantle that can reach lengths of up to 30 centimeters (12 inches) in adulthood. The mantle is soft and muscular, allowing the squid to propel itself through the water with remarkable speed and agility.\n\nThe coloration of the Indo-Pacific reef squid is highly variable and can change rapidly to match its surroundings, making it an expert in camouflage. The body typically features a combination of white, brown, red, or purple hues, which can be adjusted to blend in with coral reefs, sandy bottoms, or open water.\n\nOne of the distinguishing features of these squids is their large, expressive eyes. They have well-developed vision, enabling them to spot prey and predators in their environment. They also possess eight arms and two long tentacles equipped with suckers, which they use to capture and manipulate their prey.\n\nIndo-Pacific reef squids are carnivorous and primarily feed on small fish, crustaceans, and other small invertebrates. They are active hunters and use their agile swimming and quick movements to capture their prey. They have a beak-like mouth that they use to tear apart their food before ingesting it.$

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

Close up shot of an octopus in the blue sea.

Caribbean reef squid ,Sepioteuthis sepioidea, commonly called the reef squid,

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

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

octopus close up under water, beige toning

Fresh octopus fish on the market close up

emperor angelfish, Mutton snapper,French angelfish, sea horse, Cuttlefish , stone fish

Squid in the Red Sea on the coast of Egypt

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