Anaconda is a heterozygous incomplete dominant mutation in the pattern of the snake. Many blotches connect with eachother and the side-pattern disappears. The belly has a solid black colour, with sometimes an exception with which there are speckles. When you breed two anacondas with eachother, you will get the homozygous incomplete dominant superconda morph. This morph was named after the anaconda snake, because of the similairity in pattern.