This "fighting" is really just play-sparring between 10-year old brown bear #151 Walker and his subadult buddy 503. They've been having regular play dates for a few seasons now! Rick | explore.org/bears
This bear brought her three cubs to Brooks Falls to go fishing but the sight of several other bears made her hesitate and the cubs a bit nervous. She stayed on the edge of the river observing the other bears fishing in the river resulting in in this great scene.