“…A snorkelling guide should know the types of coral so that he can increase the knowledge and insight of tourists. Several types of coral need to be known, such as Acropora branching, Acropora digitate, Acropora submassive, Acropora tabulate, coral branching, coral encrusting, coral foliose, coral heliopore, massive coral, coral millepora, coral mushroom, coral submassive [7].…”