The Falsettians were a sentient species that periodically went into deep hibernation for seven cycles.
As of 2401, Jack Crusher was wanted for the death of a man on Andreus V. He claimed to Admiral Jean-Luc Picard that, since the man was Falsettian, whether he was actually dead or merely in hibernation could not be determined. (PIC: "Disengage")
This species was only mentioned in dialogue.
This species appears to have been named after assistant producer on Star Trek: Picard, Nicole Falsetti, continuing the joke of naming flawed planets or species after assistant producers.