An assorted GMO Widow Tetra is a genetically modified version of the Black Widow Tetra that displays vibrant, fluorescent, and varied colours like green, blue, pink, and orange. These peaceful, schooling community fish grow to about 5-8 cm, are suitable for beginners, and thrive in well-planted aquariums with open swimming spaces, a variety of food, and a school of at least six individuals to prevent fin nipping.