Large Tube Sponge

Overview

The Large Tube Sponge (Haliclona fascigera) is a marine sponge known for its distinct tubular growth form. It is primarily found in the Indo-Pacific region, where it inhabits hard substrates on reef flats and mixed coral reefs.

Appearance

This species typically grows as a single tube or in clusters, sometimes reaching heights of 30 to 80 cm. Its coloration is variable, ranging from shades of pink to sky blue or lilac. The surface of the sponge is generally smooth with irregular circular swellings, and the edges near its openings may appear pale or transparent.

Biology & behavior

Like other members of the class Demospongiae, Haliclona fascigera is a filter feeder that draws water through its body to extract planktonic microorganisms. It is a hermaphroditic species that reproduces sexually by releasing gametes into the water column, which eventually develop into free-swimming ciliated larvae that settle on the seafloor. While some sponges are known for their longevity, this species is considered a common component of its reef environment and is generally recommended to be left in the wild rather than collected for aquariums.