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so when it comes to the dolphins as abc's linzy janice shows us, behind the seemingly smiling face therely mind of a predator. >> reporter: dolphins, we often think of them as friendly, innocent, almost cuddly creatures of the sea. instead, biologists say we should see these mammals as the cunning hunters they really are. >> they need to make a living. they eat fish. their predators. they're good at it. so, yeah, they're no different than a lion, tiger or anything else for their niche. >> to find out more about these cute killers, "nightline" traveled to folly beach, south carolina where we met up with filmmaker scott snyder who took us out on his boat. snyder is a director of photography at national gee graphic and wrapped work on the secret life of predators. among expected tales of lions and tigers, there is another more surprising group of predators, dolphin. who happen to live right here in snyder's own backyard. the bottle the nosed dolphins here have a secret. they have taught themselves an extra ordinary and death defying technique to track their prey. it's called stranding. >> i

abc's linzie janice is on the story. >> reporter: this new video may be evident that hilaria baldwinis no comedy show spoof. it's alec baldwin as we have never seen him before. >> now, alec is going to come behind me and he's going to press into my hips gently. >> reporter: the actor known for his tirades appears to be revealing a softer side in his wife hilaria's new dvd. the fit mommy to be prenatal dvd stars then-pregnant hilaria. she opened up about the couple's balance of power. saying he very much did what i wanted him to do. i was the boss that day. >> i think he's wildly in love with his wife. and he's there to support her. i think she's been a calming influence on him. >> reporter: he's credited his wife for getting happier and healthier. hilaria is one of the ancient fitness's regime biggest fan. alec baldwin's latest supporting role, comes after his run-in and lashing out a reporter. he tweeted, i'm going to find you, you toxic little expletive and i'm going to expletive you up. hilaria said you have to let the paparazzi blend in with the environment. you got to wonder how