Mehboba's glow-lizard is a family secret. Somehow, this creature was bred in secret, and Hamraaz is one of the few remaining of its kind left on the world of Darst.
The Union have mixed attitudes about preserving alien species. On one hand, they argue that the Intelligent Aliens would dislike the fact that humanity is still handling aliens, and all non-Earth fauna and flora is forbidden to deal with. But on the other hand, they believe that if they prove themselves to be responsible enough, the Aliens may give mankind mercy, and grant them the power to ascend back to glory. Due to the present circumstances, the Union have fallen behind in political control and the people's faith, especially once the UA have shown to develop technology back again.
Tariq and his lover was living in the region ruled by the Union. It was during his parents' younger days that his home town swore loyalty to the UA. This caused much conflict, as all secrets, including that of the Glow-lizard is to be handed over in the pursuit of "advancing mankind".
Now, he was given a choice when he was involved in the illegal act of possessing an alien. He chose to give his service to the UA in exchange for avoiding imprisonment. And so, all that is involved, including Mehboba, shall be given a second chance, as long as Tariq obeyed to be transported off-world for his new job.
Now, as if by fate, his job is to study Hamraaz, that is brought with him to the Merskan colony. The other veterinarians are amused by this creature, as they only got to deal with rats and plants.