Mystery baby fish were found inside a bizarre jelly-like tube in South Korea.

Footage shows the tiny creatures swimming inside the strange tube-shaped sac found at a flooded swamp in Seoul.

Thai student Min who was walking in the park noticed the squishy egg-like object and picked up one of them only to be left confused about what the fish-looking creatures were.

However, she asked the locals around and found that the jelly could be from a native species of salamander and the tiny 'fish' were actually the amphibian's babies.

Min said: 'People told me that the tiny fish will grow into salamanders. It was the first time that I saw one. The tube was very soft and strange to touch but it appeared to be quite durable.'