Oxtail fish? Platypus family? Mackerel? Platypus? marine fishes

What is the picture below? Indian mackerel (Indian oxtail, mackerel)

The largest oxtail fish can reach a meter long. The head is big and flat, and the hard thorn is easy to hurt people. The hoe teeth are canine-shaped, forming an arc-shaped horizontal belt, with only one row of palatal teeth. There are 2 anterior spines of gill cover, and there are cortical flaps at the edge of gill cover. Brown body, yellow belly, with 8 to 9 irregular black spots.