The zoo tweeted out a photo of the baby hippo, asking its followers to share sympathy with staff over the loss.
Sad to announce the death of our pygmy hippo calf. Please share your sympathy with our staff. pic.twitter.com/KhfCLfOItm— San Diego Zoo (@sandiegozoo) November 20, 2015
The 12-pound baby was born in the early morning hours of Nov. 13 to mother hippo, Francesca. It was the first surviving hippo birth for the San Diego Zoo and Safari Park in more than a decade.
Pygmy hippos are an endangered species native to forests in West Africa. There are less than 2,000 of these small hippos in the world, with most of the population concentrated in Liberia, Sierra Leone, Guinea and the Ivory Coast.