Fishermen always want to know who's doing a good business, although they don't say much. He wasn't interested in striking up a conversation, barely glancing up.
Fishermen never say much to other fishermen if they know anything about tradition.
Fishermen don't share information. He probably wasn't catching big ones. But even if he had been, he probably wouldn't have said much. He was in his late 60s, maybe 70. A regular here.