Triacanthids

Triacanthids are a family of ray-finned fishes belonging to the order Tetraodontiformes. They are commonly known as triple-spined or tripod fishes due to the presence of three prominent spines in front of their dorsal fin, though some species may have fewer. These spines are sharp and can be used for defense.

These fish are typically found in the Indo-Pacific region, inhabiting tropical and subtropical waters. They are generally demersal, meaning they live near the seabed, and are often found in coral reefs, sandy bottoms, and seagrass beds. Triacanthids are relatively small, with most species reaching lengths of up to 20 centimeters.

The diet of triacanthids varies depending on the species but generally includes small invertebrates such as crustaceans, mollusks, and polychaete worms. They are often solitary or found in small groups. Their bodies are usually compressed laterally and have a small mouth. Their coloration can vary, often providing camouflage within their habitat.

Several genera are recognized within the family Triacanthidae, including Triacanthus, Triacanthodes, and Hollowayina. While not commercially important for food, they are sometimes collected for the aquarium trade. Their unique morphology and defensive adaptations make them an interesting subject of study within ichthyology.