Tubular walls – Phaceloid
(Types of corallite arrangement)
Where each corallite forms an individual tube, joined together at the base, the colony is said to be phaceloid. The genus Galaxea (p. 16 of the Coral Finder) has phaceloid corallites.
(Photos of galaxea)
Tall (or tubular) corallites with separate walls that start from a common base are termed phaceloid. The genus Lobophyllia may appear to be plocoid but is in fact phaceloid as this broken colony reveals.
A meandroid and phaceloid colony side by side. The size and scale of growth forms may vary but the principles of corallite arrangement remain the same. Experience underwater is key.