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Amphioctopus aegina, commonly referred to as the marbled octopus or the sandbird octopus, [2] is a bottom dwelling species residing in the coastal zone of the Indo-West Pacific. [ 3 ] Planktonic hatchlings and eggs are laid by females predominantly during the months of January and October, however they have been known to reproduce year-round.
Octopus is a common ingredient in Japanese cuisine, including sushi, sashimi, karaage, stew, sour salad, takoyaki and akashiyaki. Takoyaki is a ball-shaped snack made of a wheat flour-based batter and cooked in a special takoyaki pan. It is typically filled with minced or diced octopus, tempura scraps , pickled ginger, and green onion.
Other species of octopus had been observed using shells for hiding, but this was the first case in which shells were prepared and collected for later use, in what the Melbourne Museum has described as "true tool use". [9] [4] [10] Octopuses will often engage in bipedal motion when carrying stacks of debris or items larger than themselves. [4]
These octopus eat mainly fish and crustaceans. They hunt at night and can be observed foraging over reef flats or on sand and gravel substrate during nightly low tides. [ 3 ] Hunting consists of probing long arms down holes or enveloping small coral heads within the webs and using the arm tips to flush prey into the waiting suckers. [ 4 ]
It has the common name algae octopus due to its typical resting camouflage, which resembles a gastropod shell overgrown with algae. It is small in size with a mantle around the size of a small orange ( c. 7 cm or 3 inches) and arms 25 cm (10 inches) in length, and is adept at mimicking its surroundings.
The curled octopus (Eledone cirrhosa), also known as the horned octopus, [4] lesser octopus or northern octopus, [5] is a species of cephalopod found in the northeast Atlantic, ranging from Norway to the Mediterranean, including the British Isles. The total length of an adult is around 50 cm, but their arms are often tightly curled.
To understand the inner details of octopus lives, researchers dived for about a month at a reef off the coast of Eilat, Israel, and tracked 13 octopuses for a total of 120 hours using several cameras.
In 2004, Gleadall resurrected the genus Schizoctopus and assigned Octopus fangsiao as the type species. [4] In 2005, Huffard and Hochberg, arguing that Robson's designation of Octopus membranaceus as a nomen dubium was premature and considering it a valid name, resurrected the genus name Amphioctopus for the Octopus aegina species complex.