This fishes are one of the sought after decorative fishes. They are often in pools in gardens but a few have them in aquariums.
This was a shot I took when I was still in Guam. One of the hotels has this amazing pond setup just outside of the restaurant in the hotel. After a great lunch, you can stroll and see these creatures as they swim around from one pool to another and from time to time raise up to either eat something above the water or I think catch some air.