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Common long-arm octopus (Octopus minor). (a) Photograph of O. minor. (b) Habitat structure of mudflats and phenotypic differences between O. minor and Octopusbimaculoides. Octopusminor has a smaller body size and possesses longer, thinner arms than those of O. bimaculoides. (c) The distribution of O. minor is shown in red. The distribution map was updated from Roper et al. (1984)11.
