Undercover fish and game in La Jolla?

Today I believe I was questioned by a fish and game guy. We were loading up our kayaks and had the cooler open with our fish in it and and a gentleman and his wife were walking by and came up and were looking at our catch and asked if he could buy one of our bass I told him no and our convo continued, then he asked again if he could buy one because he wanted to have some fesh fish for dinner and I told him no and informed him it was illegal and it could be a hefty fine and he laughed and said ok glad to hear it and said he was with fish and game and congratulated us on our catch and continied on. He didnt fit the profile of a game warden it just seemed kind of off to me. Anyone ever had any encounters like this before?