Lyretail Anthias

Overview

The Lyretail Anthias (Pseudanthias squamipinnis) is a vibrant, reef-associated marine fish widely distributed across the Indo-West Pacific. These social fish are frequently observed in large, active aggregations hovering above coral outcrops, lagoons, and outer reef slopes during the day.

Distribution & habitat

This species is found from the Red Sea and South Africa to Niue, extending north to Japan and south to Australia. They typically inhabit clear, current-swept waters near coral reefs, where they utilize rocky crevices for shelter at night.

Appearance

This species exhibits marked sexual dimorphism. Females are generally smaller, reaching up to 7 cm, and display a golden-orange body with a distinct violet-edged stripe behind the eye. Males can grow up to 15 cm and are more reddish or fuchsia in color, characterized by an elongated third dorsal spine and a lunate, lyre-shaped tail. Both sexes possess a fusiform, compressed body shape.

Biology & behavior

Lyretail Anthias are protogynous hermaphrodites, meaning all individuals are born female and can transition into males. They live in stable, haremic social groups typically consisting of one dominant male and several females. If the dominant male is lost, the largest female in the group will undergo a sex change to replace him. They are generally peaceful toward other species but maintain strict hierarchies within their own groups.

Feeding

These fish are planktivores that feed primarily on zooplankton in the water column. In their natural environment, they remain active throughout the day to forage.

Reproduction

Spawning occurs in open water, often at dusk. The process involves a courtship dance initiated by the dominant male, followed by the release of eggs and sperm into the water column. The resulting eggs and larvae are planktonic.