In January 2016, visitors at Seoul's COEX Aquarium in South Korea witnessed an unusual and disturbing incident involving two sharks.
An eight year old female sand tiger shark, measuring approximately 2.2 metres, attacked and swallowed a smaller five year old male banded hound shark.
Aquarium officials believed the incident was connected to a territorial dispute.
According to the aquarium's public relations manager, sharks can react aggressively when they unexpectedly bump into one another.
The male shark may have startled the larger female, triggering an attack.
However, the exact reason for the incident was never conclusively established.
The attack reportedly began on a Thursday evening. Over approximately 21 hours, the female gradually swallowed the smaller shark.
By the following morning, visitors could see only the tip of the male's tail protruding from her mouth.
