Heterometrus longimanus, commonly known as the Asian Forest Scorpion or Borneo Forest Scorpion, is a large, glossy black scorpion native to the tropical rainforests of Southeast Asia. It is a member of the Scorpionidae family and is frequently kept as a pet due to its impressive size and relatively hardy nature. 
 
Key Characteristics
Appearance: Reaches lengths of 10–14 cm (4–5.5 inches). It features a uniformly black, shiny exoskeleton and elongated, powerful pincers, which are particularly pronounced in males.
Behaviour: Primarily nocturnal and secretive, often found burrowing under logs or rocks in the wild. While they can be defensive and are more prone to using their pincers than their sting, they are generally considered less docile than the similar-looking Emperor Scorpion.
Venom: Their sting is considered medically insignificant for humans, typically causing localized pain, swelling, or a sensation similar to a bee sting. They rely more on their physical strength to subdue prey like insects and small invertebrates.
Fluorescence: Like most scorpions, they glow an ethereal turquoise or blue-green colour under ultraviolet (UV) light. 
 
Captivity & Care
For enthusiasts, H. longimanus is often recommended as an intermediate-level species because it requires strict humidity management. 
 
Feature 
Requirement
Temperature
24°C – 30°C (75°F – 86°F)
Humidity
High (70% – 85%), requiring regular misting
Substrate
Deep soil or coco-fiber mix to allow for natural burrowing
Diet
Live insects such as crickets, locusts, and cockroaches