A grouper smoothly approaches a working diver, asking to be petted, and the diver stops working to give it a pat. https://t.co/Bkm10jH9wd https://video.twimg.com/ext_tw_video/1800963744916176897/pu/vid/avc1/640x480/2FAmi9TJ9FnJbFjA.mp4?tag=12