This has been making the rounds but it’s really worth a watch: Tuna fishermen went out with a remote controlled underwater camera and ended up filming dolphins swimming along. You get a dolphin’s eye view and it’s really cool (starting about 1:50). Dolphin Cam!
And it looks like I waited too long to post this (viewing season is winding down until September) but explore.org had a live cam on the river showing brown bears fishing for salmon. Bear Cam!