A nonstop frenzy of fish activity gives this site its name. Great visability. Cool underwater architecture. Caves. Canyons. And of course sharks and rays. An absolute knockout of a dive site. Discovered ... A nonstop frenzy of fish activity gives this site its name. Great visability. Cool underwater architecture. Caves. Canyons. And of course sharks and rays. An absolute knockout of a dive site. Discovered during the second Marquesas voyage of the liveaboard vessel the French Polynesia Master.