Arothron reticularis (Reticulate Toadfish)

From fishes of Australia:

A greenish-brown puffer with many white lines, spots and reticulations above, white lines around the eye and gill opening, and lower sides ans belly white with greenish-brown lines curving upwards on sides of head; pectoral fin base black, often with pale lines, and white pigment surrounding the anus. Fins greenish-brown, caudal fin with pale spots.