A people of the alternate reality whose government, the Fibonan Republic, asks Captain Kirk to carry an ancient artefact to the Teenaxi as a peace offering at the start of Star Trek Beyond.
The Fibonans are a spacefaring people who have long been at odds with their neighbours, the Teenaxi. They are not seen on screen; everything known of them comes from Kirk's attempt to speak on their behalf.
In the opening scene of Star Trek Beyond, Kirk stands before the Teenaxi assembly as a neutral envoy and presents a piece of an old weapon as a gift from the Fibonan High Council and a token of peace. The Teenaxi suspect a trick, ask why the Fibonans no longer want it, accuse them of being thieves who mean to eat them, and swarm over Kirk until he is beamed out.
The rejected gift is logged in the Enterprise archive vault. It proves to be one half of the Abronath, the bioweapon that Krall is hunting, which is why his swarm attacks the ship at Altamid.