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They have eight arms (like any other octopus), but these affixed together in an umbrella shape. [6] However unlike other octopus, they are unable to camouflage by changing skin color and texture. [7] They have a gelatinous body, which spreads into a parachute shape when maneuvering through dimly lit water. [6]
The major neurotoxin component of the blue-ringed octopus is a compound originally known as "maculotoxin"; in 1978, this maculotoxin was found to be tetrodotoxin, [17] a neurotoxin also found in pufferfish, rough-skinned newts, and some poison dart frogs; the blue-ringed octopus is the first reported instance in which tetrodotoxin is used as a ...
These responses include jetting water, changing body texture, and other behaviors that are consistently demonstrated to specific individuals. [45] They have the ability to solve simple puzzles, open childproof bottles, and use tools. [23] The octopus brain has folded lobes (a distinct characteristic of complexity) and visual and tactile memory ...
The video reveals the octopus's white tentacles gradually unfurling from their rocky hiding place. As if performing a magical transformation, the creature swiftly changes color, adopting a vibrant ...
Color change is widespread in ectotherms including anoles, frogs, mollusks, many fish, insects, and spiders. [49] The mechanism behind this color change can be either morphological or physiological. Morphological change is the result of a change in the density of pigment containing cells and tends to change over longer periods of time.
Mimic octopus showing typical pattern. The mimic octopus was first discovered off the coast of Sulawesi, Indonesia in 1998 on the bottom of a muddy river mouth. [5] [6] It has since been found to inhabit the Indo-Pacific, ranging from the Red Sea and Gulf of Oman in the west to New Caledonia in the east, and Gulf of Thailand and the Philippines in the north to the Great Barrier Reef in south.
To change colour the animal distorts the sacculus form or size by muscular contraction, changing its translucency, reflectivity, or opacity. This differs from the mechanism used in fish, amphibians, and reptiles in that the shape of the sacculus is changed, rather than translocating pigment vesicles within the cell.
Adult weight is generally 100–150 grams (3.5–5.3 oz), but animals up to 400 grams (14 oz) in weight have occasionally been observed. [6] [3] Like all octopuses, O. rubescens can change its color and texture, making its appearance highly variable. Color can vary from a deep brick red, to brown, to white, or mottled mixtures of the three.