Rock flathead – Platycephalus laevigatus

The Rock Flathead, Black Flathead, Grass Flathead, Grassy Flathead, King Flathead, Marbled-bellied Flathead, Port Albert Flathead, Rock Flathead, Smooth Flathead, Southern Rock Flathead, scientifically known as Platycephalus laevigatus, is a fish species belonging to the flathead family (Platycephalidae). These fish are characterized by their flattened bodies and wide, flattened heads, a common adaptation among bottom-dwelling fish.

Description & Characteristics

Platycephalus laevigatus is a relatively large flathead species, reaching a maximum size of 50.0 cm. The body is typically brown or grey, often with darker markings or blotches. Its underside can be marbled, giving rise to the common name “Marbled-bellied Flathead.” The head is large and flattened, with a wide mouth and prominent eyes located on top of the head.

Habitat and Occurrence

Platycephalus laevigatus is a common inhabitant of coastal waters, particularly in the inshore areas of temperate and subtropical regions. This species is typically found in areas with sandy or muddy bottoms, often near reefs and rocky outcrops. The depth range for Platycephalus laevigatus can vary, but they are generally found in shallow waters, ranging from the intertidal zone to depths of up to 100 meters.

Taxonomy

Platycephalus laevigatus belongs to the Class: Teleostei, Order: Perciformes, and Family: Platycephalidae. These classifications place Platycephalus laevigatus within the broader group of ray-finned fishes (Teleostei), a diverse and abundant group of fish. The Order Perciformes, which includes Platycephalus laevigatus, is the largest order of vertebrates and includes many familiar fish species, such as perch, bass, and tuna. Finally, the family Platycephalidae, which includes all flathead species, is characterized by its flattened bodies and wide, flattened heads, making them well-suited for a benthic lifestyle on the seafloor.

Feeding

Platycephalus laevigatus is a carnivorous fish, feeding primarily on crustaceans, fish, and shrimp. Its predatory nature is reflected in its strong jaws and sharp teeth, which allow it to effectively capture and consume prey. The diet of Platycephalus laevigatus varies depending on its location and the availability of prey. However, crustaceans, particularly shrimps, are typically a significant component of its diet.