Zountrones

Translading to "live eat" in Greek, they certainly do that. These alien creatures eat their prey alive and absorb the energy, producing stomach acid when their prey is drained to dissolve the body.

They were originally captured to be genetically manipulated for war, such as a more violent demeanor and body armor. The ship they were being altered on was destroyed, however, and sent the born and unborn Zountrone across space. The already hatched creatures died, but the eggs survived, due to their DNA being altered to survive in such conditions. About half of the eggs found themselves on new planets.

Thus, with plenty of luck, Galac and Mavypa found themselves on the same planet; inhabited with many different creatures much smaller than themselves. They were part of the same brood on the ship, but they had been at different stages of DNA alteration, so look somewhat different.

Zountrone breed asexually, meaning that they do not require a fertilized egg to have a child. They can produce stomach acid at will, and some can spit that stomach acid. Others also have larger than average tongues, necks, or stomachs, due to irregularities in the alien DNA manipulation. Many grow to be quite fat based on how much they feed; for example, Galac is quite the eater, and dissolves more prey. Mavypa only eats when she needs to, so she's skinnier than average. Zountrone are designed to store that fat however, as they originated from a planet distant from its sun; it can also be a sort of armour and protect the vital organs.