Yellow Finger Coral

Overview

The Yellow Finger Coral (Porites cylindrica) is a reef-building stony coral known for its distinct, branching growth form. It plays a significant role in creating structural habitats on reefs, often forming large, bushy colonies that can span several square meters.

Distribution & habitat

This species is widely distributed across the tropical Indo-Pacific, including the Red Sea and the Indian Ocean. It is commonly found in shallow environments, particularly in lagoons and on back reef margins, where it thrives in depths typically ranging from 1 to 20 meters.

Appearance

Porites cylindrica is characterized by its thick, finger-like branches that often feature rounded, blunt tips. The colony surface appears smooth due to the presence of very small, shallow corallites. Colonies are typically cream, yellow, pale brown, green, or blue in color, often with paler branch ends. While they may develop an encrusting base, their primary structure consists of these branching, sometimes irregular, projections.

Biology & behavior

As a hermatypic coral, it relies on a symbiotic relationship with photosynthetic algae called zooxanthellae, which live within its tissues and provide essential nutrients. The species is hermaphroditic, possessing both male and female reproductive organs. While it is relatively resilient to bleaching events and can recover more quickly than some other species, it remains vulnerable to sedimentation and certain coral diseases. It is also capable of asexual reproduction through fragmentation, allowing colonies to expand or recover after physical breakage.