>> oh, my gosh. he's huge. >> he's gigantic. this is the marine toad from south america. it's an amphibian. but around the word we're losing our amphibians. we will likely lose half of them halfway through the century. these are animals that have been on our planet for 350 million years. there is a chance this could be extinct some day. >> this constant thing with what do you call it, gut? >> that's his chin. he's actually pumping that back and forth and drawing air in through his nostrils and he's got a very wet vascular membrane. they also bring through their skin. the reason why they're in trouble today is because as they