Similar to how you can take a bubble of air underwater to look at fish using some sort of helmet, this fish dome floats on the top of the water and brings a bubble of water above the water line so you can see the fish that swim into it. Perfect to throw into the pond or koi fish pool, the fish dome allows you to easily observe your fish at close range, and also works great to spot early detection of a diseased fish. To get the fish to come into the bubble simply slip some food into the bubble by reaching under it (the food will float to the top), once you do this a few times your fish will be trained to come to the dome when you come around so you won't have to wait around in hopes a fish will pop up in the dome.

The fish dome is made from a polystyrene float, a perspex cast acrylic dome, and fabric, is recommended to use with ponds that are at least 32 inches deep, the overall float measures 30 inches in diameter, and the bubble measures 20 inches in diameter.