Deaths
At the start of the Games, the Morphlings reached the Cornucopia shortly after Finnick and Katniss (because Mags swam to Katniss while Finnick was retrieving Peeta). During the bloodbath, the male was killed but the female luckily managed to escape with her life.
Later when Peeta, Katniss and Finnick were attacked by monkey muttations, Peeta was about to be killed by a monkey mutation, until the female Morphling jumped in front of Peeta to protect him and received a huge gash in her neck. After Peeta finished off the monkeys, he took her body to the beach where he comforted her by telling her to look at the colors of the sunset. Katniss observed that she was shaking and didn't know whether it was the shock from the attack, or withdrawal from her morphling, and she soon died in Peeta's arms. After she bled to death, Peeta took her corpse to the water to let it drift off until a hovercraft came to take it away. He later questioned why she sacrificed herself for him.