The fishing rod disappeared? Uh oh... Spitelout's not going to like that. High-tide probably came in and lifted the fishing rod off the shore and the low-tide swept it out to the sea.
Oh, I've got it! Ruffnut is good friends with a Scauldron named Scauldy. Maybe she can convince Scauldy to help look for the fishing rod underwater. Go to Berk and talk to her.
Looks like the tides took it after all. High-tide and low-tide both happen twice a day. Of course, Snotlout wouldn't know that! The Moon's gravity pulls on our ocean like a magnet. The pull of the Moon is so strong that it makes the water bulge into a high-tide on both sides of the Earth! Crazy, huh?
Scauldy's a master at following the tides! He found the fishing rod and dropped it over there on that sea stack. Go grab it!
Oh, that makes total sense. Yeah, I get it now! Hiccup's not the only one with brains out here, you know... Thanks for getting me out of trouble, [Your Viking's Name]. I owe you one, and Jorgensons always pay their debts!
Tips
Step 1: The tide pools are now under water, so you won't see them. Follow the arrow to trigger the next dialogue;
Step 4: To meet Ruffnut and Scauldy, click to "Explore the sea" on your world map.