They do jump but as long as your aquarium is mostly covered... should be ok. Sword like a school. They create a higharchy system. Without a few other swordtails, he may harass other fish. How large in your tank? One male and 2-3 females is good. Swords require clean water so keep up on you water changes. They also like a larger, and preferably long aquarium. They are all really the same species just different color variations. Sometimes livebearers like guppies and formerly black mollies can be so inbred that the species becomes weaker. Swords have been ok and are still hardy. A green sword would be the hardiest because it is the natural color morph but there are many beautiful colors. One of the newest is the koi coloration, you should lok for them.
