since you said it doesn't already have a backstory, i figured i would try my hand at free-writing a bit. :

some time in the late 42nd century, human colonization had reached an all time high. no longer did man need to bother adapting to worlds, he could simply build his own to suit his needs. however, there was still reason to explore. new species were discovered at an astonishing rate, and each had to be studied, measured, and tested for possible integration on human worlds and environments. so wildlife study habitats such as this were built, and worlds like this one were used to test the integration of multiple species from various worlds into the same environment. Hydratus 9, build and populated by Hephaestus industries, was a water world, built with the soul purpose to experiment with introduction of new apex predators into already stable systems. stations like this were scattered across the world to allow ease of observation and study of each predator's natural habitat. this particular station studied a highly-intelligent pack hunting creature that was similar in physical characteristics to both reptiles and squid, but rather than from the kingdom of animalia, this one belonged to the kingdom of fungi.