Nehu, Stolephorus purpureus, a Hawaiian Anchovy

Nehu, Stolephorus purpureus, a Hawaiian Anchovy, was used for bait in the Hawaiian Tuna Fishery, back when tuna were still caught by pole and hook.  Here, a large school congregates along the shoreline to avoid predation by larger fish.

In the Bait Ball

Huge school of Nehu, Waikiki, Hawaii. I've heard of huge bait balls, giant swarms of fish. However, I've never been in one. This one was perhaps a measly hundreds or even a thousand fish but being in the middle of it is an amazing and beautiful experience nonetheless.