Figure 1.  This is a frame grab from a video uploaded by CathyGo in YouTube showing a black and white fighting fish (scientific name: Betta splendens).

See the video here: http://www.youtube.com/watch?v=Iv6JZ6LObug.

Figure 2. This is a frame grab from the same video showing a blue and yellow fighting fish.

Figure 3.  This is a frame grab from the same video showing another exotic-looking fighting fish.