A necropsy of a female dolphin found stranded on Florida’s Fort Myers Beach revealed plastic bags and a piece of balloon in her stomach.

The rough-toothed dolphin had washed up on shore Tuesday, according to local news station WFLA.

Rescue workers had initially tried to save the young animal, but she was emaciated and in such poor health that wildlife officials decided that euthanizing her was the best course of action, The Associated Press reported.

On Friday, the Florida Fish and Wildlife Conservation Commission posted photos of the dolphin’s stomach contents, showing she had eaten two plastic bags along with a piece of a balloon.

While officials noted the stomach contents were a “significant finding,” they said that it was as of yet unclear what specifically caused the dolphin’s illness and stranding.