UNDERWATER FA/RA of otter chasing cutthroat trout, shot beginning with trout rushing toward/past camera, otter following, then trout swimming past/away from camera in opposite direction, otter following; camera stationary. UNDERWATER FA/RA of otter chasing cutthroat trout, shot beginning with otter moving toward/past camera, then trout rushing past/away from camera in opposite direction, otter following; camera stationary. UNDERWATER RA/FA of otter chasing cutthroat trout, shot beginning with trout swimming toward/past camera, then trout (followed by otter) rushing past/away from camera in opposite direction, then back again; camera stationary. UNDERWATER RA/FA of otter chasing cutthroat trout, otter moving past/away from camera, then trout swimming toward/past camera, then seconds later otter (with trout in mouth) swimming toward/past camera; camera stationary. UNDERWATER FA/SA of otter sneaking up behind cutthroat trout and attempting to bite trout's tailfin; trout darting away out of frame, otter disappearing in opposite direction then pursuing trout and kicking up a lot of rocks and other matter in process; camera stationary. (42247)