This is Peanut the turtle, shortly after being found in Missouri in 1993. She was taken to to a zoo in St. Louis where the six-pack ring was removed.
It seems that she was trapped in the plastic ring as a young turtle and was unable to free herself. Subsequently her shell moulded itself to the plastic ring and she grew in the strange shape you see here.
Unfortunately the damage is permanent, but peanut is expected to live a long life and today she serves as a mascot for the fight against beach littering.
Please, always remember to clean up after yourself at the beach.
Also, always cut 6 pack rings, even if you just found one on the ground. Even if you throw it out, most garbage unfortunately ultimately gets dumped in the ocean anyway.
Okay, but real talk. People would always make fun of me in the ASB store which I worked in. Because I would cut them up. I told them I wanted to save the sea life and they would laugh at me because we are in more towards the land than the ocean.