Betta fish are best known for their beautiful fins and bright, vibrant colors. They have amazing anatomy. Without their colors or fins, bettas would not be nearly as popular as they are today.Anatomy

Dorsal FinEdit

The dorsal fin is located on the top of the fish and is used for stability when swimming through the water so that your betta can swim in a straight line. Without it, your betta would struggle to swim straight, swimming and zagging around the tank, and have a hard time getting to where it needs to go. The dorsal fins serve to protect the fish against rolling, and assists in sudden turns.