“…They provide limited evidence due to their non‐transparent coral skeletons, which restrict the direct observation of the structures and related parameters in coral colonies (Marfenin, 2015 ). In recent years, computed tomography (CT) has been applied to study reef‐building coral skeletons (Beuck et al, 2007 ; Gutiérrez‐Heredia et al, 2015 ; Knackstedt et al, 2006 ; Kruszyński et al, 2007 ; Kruszynski et al, 2006 ; Pinzón et al, 2014 ). With the development and popularization of high‐resolution micro‐computed tomography (HRCT), research on coral skeletons has revealed the morphological and internal structures of coral branchlets, and also investigated coral skeletal structures (Ivankina et al, 2020 ; Sentoku et al, 2015 ; Sentoku et al, 2015 ; Urushihara et al, 2016 ) and exogenous influences on coral skeletons, including water currents (Chindapol et al, 2013 ), the marine environment (Iwasaki et al, 2016 ), and ocean acidification (Enochs et al, 2016 ; Fordyce et al, 2020 ).…”