octopus

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7mo
The 2017 Underwater Photographer of the Year Contest
© Gabriel Barathieu
The seemingly chaotic, but elegant movement of the octopus: how it pulls it off
Despite lacking a rigid skeleton, octopuses have a remarkable coordinated locomotion. Using high-speed cameras, a group at the Hebrew University of Jerusalem found the octopus achieves this by precisely and independently moving one or more of its eight legs to crawl its body, even when its facing a different direction. Moreover, there is no discernible rhythm or pattern to this undulating leg movement, making the octopus unique in this respect. It's controlled chaos, and only the octopus ...
Poison ocellate octopus: This small octopus is normally plain brown in color, but can assume a bright, striped pattern with a single blue ring when disturbed. The color change advertises a venomous bite. (Amphioctopus siamensis; Alor, Indonesia)