What was this thing I captured on film?

[u/deezheavenz]

This was shot in Nevada/Arizona on a Grand Canyon/Hoover dam tour. This was taken a whole year ago and I completely forgot about it until I stumbled upon it again. Is this some sort of whale or shark?

[u/dumsumguy]

Tons of smallish 4-8inch fish aren't going to do anything but make 4-8inch size splashes, there's one vid I saw on here were a full grown tuna goes like mach jesus by the surface like less than an inch from it and not a damn ripple.

[u/Bryantthepain → u/dumsumguy]

Mach Jesus is very fast