A turf war at the COEX Aquarium in Seoul turned ugly when an eight-year-old female shark ate a five-year-old shark. Aquarium officials said it was likely a fight started when the younger shark bumped into the larger one.

It took the female shark 21 hours to finish eating the male one, meaning the little shark was just hanging out in the big shark’s mouth for a day. The worst part? She is likely to regurgitate most of her dinner.