Fig. 1From: A practical staging atlas to study embryonic development of Octopus vulgaris under controlled laboratory conditionsOctopus vulgaris eggs and the embryonic morphological body axes. a A string of O. vulgaris eggs. Scale bar represents 500 μm. b The morphological axes in cephalopod embryos correspond to the axes in other mollusks. In this orientation, the location of the funnel is posterior, the embryonic mouth is anterior, the arms are ventral and the mantle is dorsalBack to article page