At least it's free and welcome to fish on the beach. No one owns this beach or the rights to the fish in its waters. That and company make Tsukasa comfortable with fishing this slow inefficient way. Waiting for the fish. It's not like he could hear the story while diving under the water and spearing fish directly. This sort of interaction is also one the fox encourages, so in a way it's three birds with one stone.

Fishing rod. Bait. A seat in the sand. A line cast in the ocean. Quiet and peaceful.

"No," Tsukasa answers. "I know about various crystals, not a definitive one." The Crystal. Tsukasa could hear the capitalization in the way Noctis spoke. He mentally decides to take notes in case it is of interest to Senku, for science's sake.