Turn your phone sideways to get a larger view. You can also click “Vimeo” and then click the “Full Screen” button.
While focusing on filming a small reef creature I spotted something moving in the corner of my eye. A head-turn to the right and suddenly I was engulfed in a ball of schooling fish. Not just a few either. More in the range of a thousand moving in precise co-ordination to the right and then to the left then back again, swirling and darting in lightning fast turns.