Yes, there are dolphin tours operating out of Port A. I don't know anything about their business but there are plenty of dolphins in the area. I love to fish and whenever I'm around the ship channel I always see dolphin roaming around in the water.
Actually, to be more correct, they are not a "Dolphin", but rather they are a Porpoise. They are an air breathing mammal but they go fishing everyday for a living, so whenever I see them I usually up-anchor and go somewhere else. Fishing usually sucks when you see these guys around, they are better fishermen than I am.