Some kayakers in Costa Rica had a front-row seat as a whale launched itself out of the water and came crashing back down. Watch here.

A group of snorkelers were surrounded by some Pacific white-sided dolphins, but then, their guide spotted something else . . . something big.

A group of sperm whales congregating just below the surface of the ocean appear to “chatting” in a snorkeler’s incredible video.

Spectacular drone footage from Australia shows a surfer in the ocean next to a massive southern right whale. Watch here.

“Just because you can’t see it doesn’t mean it’s not there.” And this video is proof. See what’s below the ocean’s surface here.

A kayaker really didn’t know what to say or do when he came across a humpback whale sticking its massive tail straight up into the air.

A humpback whale managed to sneak up behind a free diver, nearly smacking him in the head with its tail. Watch here.

Did these sperm whales just protect a diver from a curious (but deadly) oceanic white tip shark? The diver certainly believes so.

A professional kiteboarder came across a whale mom and calf in a “one-in-a-million” encounter—a “pure stoke” moment he’ll never forget.

A photographer filmed a tiger shark and a massive sperm whale. Here’s why he says it’s the craziest encounter he’s ever seen.