I held the lid for a fisherman at Punta Sur and got a fish tail

At Punta Sur a fisherman was trying to fit a very large fish into a very small bucket, and I offered to hold the lid. We sat on a rock for an hour, he with the bucket and me with the lid, both a little unsure how it had happened. He gave me the tail. I gave him my sandwich. Neither of us has discussed the exchange rate. I go back on Fridays. The bucket is bigger now, which feels like it was my doing.