Fungia coral white mushroom

Very pretty example of a white coral which would be called fungia or mushroom coral and which would come from the indian ocean. It dates from the 60s or 70s. I imagine and hope that its fishing is now completely prohibited. I left it as is without even daring to clean it but I think it was kept in a display case because it doesn't even seem dusty. It seems to me to be in rather good condition, two small areas where a few "strips" seem broken, not sure if it's original or not, and some light stains underneath. It measures 18 cm by 14 cm for a height of 7 cm. It weighs around 750g.