A wealthy, strictly neutral people who had enjoyed ten generations of peace and who, through their hired negotiator Devinoni Ral, won the rights to the Barzan wormhole in 2366.
The Chrysalians are one of the parties in the Next Generation episode The Price, in which the Barzan offer the rights to what seems to be the first stable wormhole. Talks are held aboard the Enterprise-D between the Federation, the Caldonians, the Chrysalians and, uninvited, the Ferengi.
No Chrysalian attends in person. They are represented by Devinoni Ral, a professional negotiator who is secretly part Betazoid and uses his empathic sense to read his rivals while he romances Deanna Troi. He talks the Caldonians out of bidding and then manipulates a staged Ferengi threat to frighten the Barzan into signing with his clients.
Troi exposes his methods, but the deal stands. It proves worthless: a shuttle survey shows that the far end of the wormhole wanders, leaving two Ferengi stranded in the Delta Quadrant and the Chrysalians with nothing for their money.