Symphony Superarctic Anaconda is a combination of the polygenic symphony trait, the homozygous incomplete dominant superarctic mutation and the heterozygous incomplete dominant anaconda mutation. Young animals are a dark grey to blackish colour. Symphony's most distinctive feature is found on the back of the head, where the pattern extending from the head and neck resembles two symmetrical musical notes. In high-expression animals, symphony produces a single bold dorsal stripe, which makes this combination look almost identical to the Symphony Superarctic Superconda.