Red Hot Chili Peppers bassist Flea may have just had the first interspecies jam session - with a gorilla.

Flea made a trip to visit the famous Koko the gorilla at the Gorilla Foundation in Woodside, California on Friday.

The musician handed over his bass to the curious primate, who promptly began plucking away on the guitar strings, and even seemed to manage a riff or two.

'She gets it!' Flea enthused, watching the gorilla get the hang of playing the instrument

Koko was very intrigued by the bass guitar and plucked the strings rather skillfully

'She's got the fingers and everything, she gets it!' enthused Flea, as Koko's long black fingers trilled over the chords.

'That's good, Koko,' he said, seeming genuinely impressed.

Two videos of the bassist and the gorilla surfaced, one on YouTube, the other on Bass Guru app on Rolling Stone.

'This is just the greatest thing that could ever happen. This is the day that I will never forget in my life,' Flea said.

'This is the greatest thing': Rock star Flea was putty in the hands of Koko the gorilla

Flea made great pals with the primate and even said he wanted to do 'future collaborations' with her

The 45-year-old gorilla, who lives with her longtime handler Francine Patterson, is a big music fan says the foundation.

'Koko was thrilled by the mellow sounds and a jamming session followed with Koko strumming on Flea's bass!' the foundation wrote on its website. It also promised 'future collaborations.'

At the session end, Flea said the gorilla could have his bass - but not the amp. 'Sorry, that doesn't belong to me,' he said.

Koko is famous for knowing approximately 2,000 English words as well as a specific sign language.