This is great for an early on tame. They don't require much meat (spoiled meat) and not a large amount of narco berries or narcotics. They are also useful to tame other creature due to there sting. For later on, these are almost essential for a good rex, the eggs are used to tame them and mean the difference between lvl 190 and level 130.

More Pulmonoscorpius Taming & KO Tips