Canaileus Prime is a Federation colony on the edge of the Typhon Expanse and home to nearly 48,000 Federation civilians and Starfleet officers in 2372. Starfleet ordered all available starships to rendezvous at Canaileus Prime to regroup to face the Myhr'an threat as it was believed this planet was the next target of the Myhr'an planet killer.
In 2298, the Federation and Myhr'an disputed each other's right to the planet, and a battle ensued. The Federation won, starting a 70-odd year period of non-contact between the two powers. (Star Trek: The Cantabrian Expeditions: "Catalyst, Part One")
- Canaileus is pronounced "cah-NAIL-ee-us".