Interactive comment on “Skeletal mineralogy of coral recruits under high temperature and pCO2” by T. Foster and P. L. Clode

General comments. This study presents a good overview of the CaCO3 polimorph precipitation in corals skeletal formation, investigating the ability of corals to switch from aragonite to calcite precipitation, especially in their early developmental stages in response to changing seawater chemistry. Mg/Ca ratio, temperature and pCO2 has been already recognized as the most important factor affecting skeletal mineralogy on adults, but less is known about the mineralogy of corals in the early post-recruitment phases. I think this is a well described article with a lot of appropriate references, through which the authors abundantly explain and clearly summarize all the knowledge and the state of arts about skeletal mineralogy. However, the paper lacks general flow, appearing poorly written in some sections (e.g. the introduction is redundant). It’s an innovative study focusing on the CaCO3 precipitation in new coral recruits.