Hikueru Glossodoris, Tuamotu Nudibranch – Glossodoris hikuerensis

The Hikueru Glossodoris, Tuamotu Nudibranch, scientifically known as Glossodoris hikuerensis, is a captivating species of sea slug belonging to the family Chromodorididae. These vibrant creatures are a sight to behold in the underwater world, exhibiting striking colors and patterns that make them stand out amongst their surroundings.

Description & Characteristics

Glossodoris hikuerensis is a relatively small nudibranch, typically reaching a maximum size of around 20 millimeters. Its body is elongated and oval-shaped, with a distinct mantle that covers the dorsal surface. The mantle is adorned with a beautiful array of colors and patterns, most commonly exhibiting a vibrant orange hue with numerous white spots. The rhinophores, which are sensory organs located on the head, are club-shaped and extend vertically. The gills, also known as cerata, are located on the posterior portion of the body and are arranged in a radial pattern.

Habitat and Occurrence

The Hikueru Glossodoris, Tuamotu Nudibranch, as its name suggests, is primarily found in the tropical waters of the Tuamotu Archipelago in French Polynesia. This species is commonly observed in shallow reef environments, particularly in areas with abundant sponge growth, ranging in depth from 5 to 25 meters. Glossodoris hikuerensis thrives in the Indo-Pacific marine zone, a region renowned for its diverse marine life.

Taxonomy

Glossodoris hikuerensis belongs to the Class: Gastropoda, Order: Nudibranchia, and Family: Chromodorididae. The classification places this species within a larger group of mollusks, specifically the nudibranchs, which are characterized by their lack of a shell and their distinctive appearance.

Feeding

Glossodoris hikuerensis is a food specialist, relying primarily on sponges for sustenance. Its diet consists of various species of sponges, which it locates using its keen sense of smell. The nudibranch’s radula, a rasping tongue-like structure, is specifically adapted for scraping and consuming sponge tissue. The sponge’s toxins are often absorbed by the nudibranch, providing it with a level of protection against predators.