The top picture is of a pond filled with Koi in a beautiful park and meditation garden in Japan. The fish were friendly and obviously used to human. They followed us as we walked along the edge of the pond. You think they were looking for food?
This other shot is of an aquarium we visited with Devon, our grandson, while out on Long Island a couple weeks ago. The tank was pristine and vibrant. And I know how they keep it that way. A man in a wet suit and standard breathing mask comes to clean the coral and plants every week. I wish I had taken a picture of him, too. But, we got a little carried away with just watching him and counting the fish.