Lophelia pertusa sample POS455-A2W originates from Leksa reef, off Norway, where it was taken with the submersible Jago during Poseidon cruise POS455 (white colourmorph). The dataset contains a spreadsheet containing the (directed) edges of the colony skeleton graph related to the calices segmentation of dataset in https://doi.pangaea.de/10.1594/PANGAEA.969465. Each label in POS455-A2W_calices dataset represents a vertex in this graph. The edges are given by their start label Node ID #1 and the label of their target Node ID #2.