The Lava Scarab is the strongest beetle in Castaway 2. They can only be found in the Molten Fields. More details on where they appear can be found on Locations of Castaway 2 Monsters, including a map.
Lava Scarabs are aggressive and will attack by themselves within a short range. As an alternative they also have a ranged attack they use when you're outside of their short range for a normal attack.
Lava Scarabs are the only monsters that can drop Ruby Shards.
Related Quests Edit
Lava Scarabs take 96 minutes to hatch