In addition to humanoid species, Kreetassa was home to plant life in the form of large trees including sacred Alvera trees. The planet also supported pathogenic lifeforms, harmless to Humans but deadly to Earth canines. (ENT: "A Night in Sickbay")
According to the Star Trek: Star Charts (pg. 60, "United Federation of Planets III") Kreetassa was located in the Psi 5 Aurigae system, in the Alpha Quadrant. This system was a single star system. Primary was a Class G star with a magnitude of +5, which was the same brightness as Sol. In the mid-22nd century, this system was in non-aligned space. In the late 24th century, this system was in or near to Federation space. The planet Pyrellia, home to the Pyrellian ginger tea, was located in this system as well.