
my version happens to be more beast like than anything. they do not have eyes but hunts by heat/smell signature the prey emits . the slits in front of the head acts as heat/olfactory sensors.
i also have the idea of them being able to 'liquify' the ground and sink into it, so they can lie in wait in ambush, much like some bug species i've seen. they can generate a sort of ultra sonic vibration that breaks apart stone, dirt, sand et. at. similar to earthquakes. they are known to liquify the ground if the tremor is big enough and the vibration frequency is just right. only the tianaks do it on a very localized point and in a more focused manner.