Unis

Unis are small, water dwelling creatures from the planet Untra. They are a primary source of nourishment for most creatures on Untra. There are so many different species of Unis that scientists do not believe they have described even 3% of them.

Appearance
Unis come in a variety of shapes, sizes and colours, however most Unis are around 10-20 cm long. Blue, silver and purple are the most common colours, and nearly every species of Unis has two eye stalks on the side of its head. The more common species of Unis have 4 fins on their sides, however some Unis have evolved to have fins on their back and rear, or to have their fins merged on both sides. One interesting species of very fast Unis has the four fins positioned with two on each side, both lining up so that the upper and lower ones (on each side) hit each other and send water jets backwards to propel the fish forwards. Other species yet have 6, 7, 8 or more fins on their sides. There is even a species that walks along the sea floor using their fins.

Behaviour
Although different species perform differently, the common Unis swim in large schools for all their life, eating small, nutritious rocks they find on the sea floor. Due to their abundance in the water, and the abundance of nutrients in their meat, they are a very common and useful food source for many creatures on the planet, including the Untralans.

Habitat
Unis can be found anywhere on Untra, albeit different species living in different areas. There have also been reports of Unis living on other planets in the Freyja system, however these have not been officially confirmed.