Finally had a few minutes to draw out my idea.
This creature is not actually a virsu, but is pretty similar. The main difference (apart from appearance and size) is that instead of the host being a living organism, the hosts are planets. Because these creatures are extremofiles and can thrive in cold temperatures they can travel through space unaided. Like a virus they can go dormant for many years and reawaken when they land on a new plant.
The two top arms are graspers, while the lower two are a sword like spike apendage and a smaller simpler grasper, more like a beetle would have on its head. Its "ears" are used for filter feeding as well as sensing minute air vibrations. It has no real sense of smell or taste, but its "ears" can detect smells on a very basic level.
It origonates from a very small, cold planet with an incredibly dense atmosphere composed of many fungus and spore-producing creatures. On planets with low gravity they can use their back fins to glide, like a manta ray would through the water.
Their diets are mainly composed of things in the air (spores, dust etc), but when they are active they require larger game. Aside from filter feeding they are carnivorous.
Because of the way tey travel, they are almost always alone, or accompanied by a brood of children (they reproduce asexually through spores).
