Starry Puffer

Overview

The Starry Puffer (Arothron stellatus) is one of the largest members of the pufferfish family, reaching lengths of up to 120 cm. This robust, demersal fish is widely distributed across the tropical and subtropical waters of the Indo-Pacific, where it is often found in clear lagoons and near external reef slopes.

Appearance

This species is characterized by a large, oval-shaped body covered in tough, prickly skin rather than scales. Its coloration typically ranges from white to grey, adorned with numerous black spots that resemble stars; notably, these spots are larger in juveniles and become smaller as the fish matures. Juveniles often display a yellowish background with dark stripes, which gradually transition into the adult spotted pattern. The head is large with a short snout and a terminal mouth equipped with four powerful, beak-like teeth used for crushing hard prey.

Biology & Behavior

Primarily diurnal and solitary, the Starry Puffer is known to defend its territory. When threatened, it employs a unique defense mechanism by ingesting water to inflate its body into a large, spherical shape, making it difficult for predators to swallow. Like many of its relatives, it contains tetrodotoxin, a potent neurotoxin concentrated in its internal organs and skin, which serves as a chemical deterrent.

Feeding

This pufferfish is a carnivore that feeds on a variety of benthic invertebrates, including crustaceans and mollusks. It also consumes sponges, algae, and coral polyps, using its strong, fused teeth to break through hard shells and structures.