The Eurekan Petrel mount is a unique pet that can be obtained in Final Fantasy XIV: A Realm Reborn. To get it, you must first complete the Eureka mission. After that, you will need to speak to the pet trader at the Eureka station and purchase the mount from him. To get the Eurekan Petrel mount, you will need to complete the following tasks:

  1. Complete the Eureka mission.
  2. Speak to the pet trader at the Eureka station and purchase the mount from him.