Board Thread:General Discussion/@comment-26273552-20170710103907/@comment-26892768-20170715205030

Two more:

Similites. Originally a species of plant and a species of humanoids in a symbiotic relationship, eventually evolved into the same species. Similites are giant - twelve feet average - and usually have wood pushing out of their flesh in random places, along with branches with leaves growing out of their shoulders and spine. They usually eat a lot, due to roots inside them absorbing nutrients directly, and they can blend in very well with the natural flora on their planet.

Tarkassons. These things are apex predators - whenever they arrive in an ecosystem, they will be at the top of the food chain. Sure, they aren't sapient, but instinct is all they need; with hard scales, multiple sets of wings, and insane heat resistance, it's obvious why they're killing machines. But what makes them feared is their ability to eject a blast of raw plasma from their mouth, much like how dragons of legend breath fire. The stuff can melt through all sorts of metals, and if not melt, than overheat any ship unlucky enough to be in the direct line of fire. And to make matters worse, these things have evolved to fly through space without issue, meaning they're all over the place.