Children (20 direct children, 20 direct and indirect children):
Isozoanthus sulcatus
Isozoanthus dubius
Isozoanthus islandicus
Isozoanthus ingolfi
Isozoanthus bulbosus
Isozoanthus magninsulosus
Isozoanthus multinsulosus
Isozoanthus arborenscens
Cape zoanthid
Isozoanthus capensis
Isozoanthus africanus
Isozoanthus altisulcatus
Isozoanthus arborescens
Isozoanthus arenosus
Isozoanthus davisi
Isozoanthus giganteus
Isozoanthus gilchristi
Isozoanthus primnoidus
Isozoanthus valdivae
Isozoanthus antumbrosus
Isozoanthus mirabilis