i've seen ever creature in the water, and i don't know what that was. and that's what got us to want to go up and try to find it and figure this out. >> jonathan hillstrand, king crab captain and star of discovery channel's "deadliest catch," believes caddy is a giant sturgeon. he set sail in 2011 hoping to prove his theory. >> the "anchorage daily news," whatever, actually put a $100,000 reward on this thing. so i was thinking about that, too, going wouldn't that be nice if i could bring this baby in. >> but despite an exhaustive search, he returns empty-handed. >> i really had high hopes about finding this thing. i'd love to go back up there, and when i get a little older, a little more time on my hands, i will go up there, and i'll disprove or prove this thing. >> until then, the myth of caddy lives on. after all, perhaps the mystery is what we love most of all.