This large quadruped creature has a total of eight limbs. It has the crude appearance of a spider, having four long and thin arms, each equipped with a sharp hooked claw. It's a vicious predator that catches prey with its hooks and rips them apart.
"Aranea" means spider in Latin. The "atrox" part is also Latin, meaning terrible, cruel, horrible. I guess it's pretty obvious that an araneatrox is a mean spider.
Hunting
The most dense spawn is west of 
Fort Troy, northeast of the outpost found there. 
The spawn is mixed with 
Atrox (Calypso) up to Stalker. The spawn is within walking distance of the revival. 
Other decent spots:
Less popular, as they are far from the revival terminal and mixed with smaller mobs:
	
                    
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                    Maturity Levels
                    Attributes of the creature. Damage vs. Armor calculations.
                    
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                    Loots
                    Loots from this creature. The "Last VU" button updates the "Latest VU" column to the current VU. Entries with a red background have not yet been reported to drop this VU. Warning: Some loots may be false.
The "Maturity" column is used to indicate the lowest maturity from which an item has been looted.
                    
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                    Locations
                    Where the creature can be found.
                    
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                    Defence Skills
                    The following skills are involved by being attacked by this creature.
                    
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                    Scanning Skills
                    You get these skills by scanning the creature.