Scorpions have between six and twelve eyes, but these are very small and not very effective, however they have parts that are highly sensitive to movement and ground vibrations. With these they can detect mates and prey, the latter (depending on the size of the scorpion) can include beetles, spiders, other scorpions, centipedes, reptiles, frogs and small mammals. They are preyed upon by nocturnal birds, mammals, reptiles, centipedes and other scorpions, so life can also be hazardous.
This scorpion is at the smaller end as far as Australian scorpions are concerned, these are usually around 3 cm in length and very slender.
These Marbled Scorpions are amongst the most mobile and common of the Australian species and do on occasion enter houses, but are more often found under items lying around the garden.
These scorpions are called Sand Scorpions (Urodacus species, currently under revision) because they build deep spiralling burrows in sandy soils. They normally don't move far from their entrance, whilst lying in wait to ambush passing prey.
Sand Scorpion, Urodacus species
The large claws are used to grasp the prey whilst bringing the stinger down to dispatch it. After a while the injected digestive juices turn the inner contents of the dead animal turn to a soup, which is then consumed up by the scorpion. There is very little wastage with this process and few meals a year are required.
Note the stinger and how it points outwards to make striking more efficient and probably more powerful by being able to thrust with its weight, rather than a weaker downward stabbing motion. This downward stabbing motion (of the fangs) is used by the burrowing mygalomorph spiders, but with their anatomy they can get more power/weight using this attack mode.