A 23-year-old woman in India recently gave birth to a baby who was born with mermaid syndrome, or fused legs, but the tot has passed away just four hours following birth. The baby had a rare condition called Sirenomelia, or mermaid syndrome, at a government-run hospital in Kolkata.

The legs were so severely fused that doctors were not able to identify the baby’s sex. Lack of proper nutrition and poor blood circulation in the mother is believed to be a main cause of this extremely rare condition.

It’s the second ever recorded case in India of a baby surviving for any length of time with the condition, and the fifth in the entire world. Thee last incident was in 2016 when a woman in India gave birth to a “mermaid baby” that lived for just 10 minutes. “I had never seen such a baby before. It is the first case of Sirenomelia in the state and second in the country,” Dr Sudip Saha, a child specialist at the hospital, was quoted as saying according to Times Now.