Take a dip in tropical waters and see the world through a shark’s eyes. 

Wildlife cinematographer and avid scuba diver Andy Casagrande clipped a GoPro camera to a hammerhead shark’s dorsal fin and let it swim away, and the resulting footage is an aquamarine jaunt around the ocean floor. You can spot plenty of other sharks of all sizes and assorted fish (including a clinging remora that's hitching a ride, too). Just wait til the end for the dizzying view captured when the shark starts swimming sideways.  

Make sure to watch it in HD. According to the credits, Casagrande shot a similar film from the perspective of a great white off the coast of South Africa. Oooh.

[h/t: Slate]