Lined Fireworm

Overview

The Lined Fireworm (Pherecardia striata) is a widespread polychaete annelid found throughout tropical coral reef ecosystems in the Indo-Pacific. Like other members of the Amphinomidae family, it is commonly referred to as a "fireworm" due to the painful, itching sensation caused by its defensive bristles if touched.

Appearance

This species typically features a soft, whitish to cream-colored body marked by a series of longitudinal dark red or brown stripes along its dorsal surface. Its segments are angular and wider than they are long. The worm possesses prominent tufts of white, urticating (stinging) setae on its parapodia, and a distinct dark red spot is often visible at the base of these structures.

Biology & behavior

Primarily a scavenger and detritivore, the Lined Fireworm also acts as an active predator. It is known to feed on small invertebrates and has been observed scavenging on injured animals, including the crown-of-thorns starfish. In some instances, it exhibits a commensal relationship, feeding on the remains of prey captured by other marine life. These worms are generally solitary and are known to engage in mass spawning events in the water column, which may be triggered by lunar cycles.

Distribution & habitat

This species is widely distributed across the tropical Pacific and Indian Oceans, ranging from East Africa to the Eastern Pacific. It is typically found in shallow coral reef environments, often residing on or near the reef structure.