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A distinct striped pattern on a species of octopus varies from one individual to the next, which could help researchers monitor the rare animal. Pygmy zebra octopuses (Octopus chierchiae), also known ...

The gloomy octopus (Octopus tetricus) is usually a solitary species. But at two sites now, researchers have discovered gloomy octopuses living in high densities and interacting with one another in ...