Acropore Digitée

Overview

Acropora digitifera is a stony coral species characterized by its digitate, or finger-like, growth form. It plays a significant role in reef-building across the Indo-Pacific, often thriving in shallow, high-energy environments where it contributes to the structural complexity of the reef framework.

Appearance

This coral typically forms colonies that grow as prostrate or upright groups of branches, sometimes coalescing into plates that can exceed one meter in diameter. The branches are generally cylindrical and tapered, measuring about 1 cm in diameter. The species is known for its distinct, elongated terminal corallites, which are often tipped with vibrant blue, purple, or yellow hues, contrasting with a base color that ranges from cream and pale brown to purple.

Distribution & habitat

Acropora digitifera is widely distributed throughout the Indo-Pacific, including the Red Sea, the Gulf of Aden, the Indian Ocean, Southeast Asia, Japan, and Australia. It is primarily found in shallow, wave-washed back reef margins and intertidal flats.

Biology & behavior

This species is scientifically notable for being the first coral to have its full genome sequenced, which has provided critical insights into coral-algal symbiosis and environmental stress responses. It possesses a diverse family of fluorescent proteins that contribute to its coloration and may play a role in light absorption or protection. Like many branching corals, it is susceptible to bleaching events caused by rising sea temperatures.