The yoga fish posture, also known as Matsyasana, is a gentle backbend that helps open the chest and improve flexibility. Practicing the yoga fish posture regularly can enhance posture by stretching the shoulders, neck, and upper back, especially for those who spend long hours sitting. This pose also promotes deeper breathing by expanding the lungs and improving oxygen flow throughout ... https://www.sagesyoga.com/blog/matsyasana-fish-pose