I saw the same show several months ago but it didn't really have any inconclusive evidence that it was anything other than a dog. Looked like a deformed dog, maybe the offspring of two species of dog like creatures. It kind of looked like a mongoloid dog you know. Either way, it could be exactly what you stated, a new animal. Evolution taking a leap before our eyes for once. Whatever leap it may have been taking, it was an ugly one from what I saw. I agree that there are deffinately things we dont know about, especially in the ocean deep. But who knows, maybe other places too. I wouldn't know much about nothing outside of the SC/NC area.