This footage was captured using a GoPro from a reef located at the cleaning station at the Aliwal Shoal Marine Protected Area, KwaZulu-Natal, South Africa.
This episode of Aliwal TV covers some more information about Aliwal Shoal and the giant trevally! Although it is a bit difficult to see this fish, you can get a better look at it at the end of the video as it swims past the camera.