The ΔSpecies station was created as a place for all species of the galaxy to mingle and learn from one another.
Unfortunately, by weird coincidence every species except humans has the ability to turn other creatures into members of their own race. Thus, it is quite hard for the employees and visitors to the station to leave with the same legs they arrived.

Gronks are amphibious species from the planet Groop. In water they are extremely graceful and sinuous, but on land they move much like slugs using their enormous tails, which hold small secondary brains. Eyeless, they sense the world around them with their many slimy and extra-sensitive antennae, which detect radiation, chemicals, and sound all in one.
They are very friendly and always happy to help humans find their true selves as new Gronks.