Subject: A Clear Cleaner Shrimp (Urocaridella antonbruunii) is swimming from one client Moray Eel to another. These little translucent shrimps who inhabit overhangs, nooks and crevices act as cleaners and can appear in large numbers.
Technique: Filming small frantic moving animals is quite difficult. The trick is not to film it from too close, giving it the freedom to move around. In post production it is easy to zoom in on the subject and to keep it as centred as possible using keyframes. Unfortunately this trick is only applicable if you film in a higher resolution (for ex. 4K) than the one you use for your finished product (for ex.HD).