Correct me if i'm wrong but this is also a Pacific Bluefin which is NOT endangered, they're most common in the northern pacific ocean they can be found in the Southern pacific also. They can be found near New Zealand, where this was captured, as well as other places around the world.
While I'm not an expert in spearfishing by any means, this is a great catch. Not only does he launch the spear cleanly, he hits the appropriate area of the bluefin accurately as well. This thing was probably worth about 12k at the end of the day!