The Dog Face Puffer (Arothron nigropunctatus), also known as the Dogface Puffer or Black-spotted Puffer, is a species of marine ray-finned fish belonging to the family Tetraodontidae. It was first formally described in 1822 by the English naturalist Edward Turner Bennett. The specific name nigropunctatus means "black-spotted" in Latin.

Distribution and Habitat

The Dog Face Puffer is widely distributed in the Indo-Pacific from the Red Sea and East Africa to the Hawaiian Islands and French Polynesia, north to southern Japan and south to northern Australia. It inhabits coral reefs, rocky substrates, and lagoons at depths from 1 to 50 meters. It is typically found on outer reef slopes and in sheltered bays.

Physical Description

The Dog Face Puffer reaches a maximum total length of 33 cm (13 in). The body is robust and somewhat elongated. The coloration is highly variable ranging from yellow to grey to blue with dark spots and patches. The face often has a dog-like appearance with a distinctive snout. The skin is thick and leathery with small spines that are visible when the fish is inflated. The eyes are large and positioned high on the head. The mouth is terminal with four large teeth fused into beak-like dental plates.

Diet and Feeding

The Dog Face Puffer is a carnivorous predator that feeds on a variety of invertebrates including mollusks, crustaceans, and echinoderms. It uses its powerful beak to crush hard-shelled prey. In the aquarium it accepts a variety of meaty foods including frozen shrimp, clams, squid, and hard-shelled foods to help wear down its continuously growing teeth.

Behavior and Reproduction

This species is generally solitary. It is a slow-moving fish that relies on its ability to inflate with water or air as a defense mechanism. It is generally peaceful toward larger tankmates but may nip at the fins of other fish. Reproduction involves pelagic spawning where eggs and sperm are released into the water column.

Aquarium Care

The Dog Face Puffer requires a tank of at least 100 gallons with plenty of swimming space and live rock. It is generally not reef-safe as it will eat corals and invertebrates. It should be kept with larger peaceful fish. Its teeth grow continuously and require hard-shelled foods to prevent overgrowth. Water temperature should be maintained between 72-82 F (22-28 C) with pH 8.1-8.4 and dKH 8-12.

Conservation Status

Classified as Least Concern by the IUCN Red List.