A mixed martial arts fighter received an offer of £370,000 to take on a chimpanzee, with a stark warning about catastrophic injuries.

Cole Johnson said what began as a joke turned into a real fight.

The event looked to have been called off after its website went offline over trust and safety.

It was later described as a cryptocurrency hoax.

In a separate case, nine chimpanzees on Ngamba Island chose a baited box on 73 percent of trials when a human pointed, called names, and food-grunted.

Pointing alone did not produce the same result.