Opisthacanthus asper is a striking, heavy‑bodied scorpion species native to the tropical forests and savannas of Central and South America. Known for its robust build, textured carapace, and earthy brown‑to‑amber coloration, this species has a distinctly “armoured” appearance that sets it apart from more slender desert scorpions. O. asper is a member of the Hormuridae family, a group characterised by strong pedipalps, moderate venom, and a generally calm, deliberate temperament.
 
This species is primarily a forest‑floor dweller, spending much of its time beneath bark, leaf litter, or in shallow burrows. They are slow‑moving, methodical hunters that rely more on strength and ambush tactics than speed. Their venom is considered mild to moderate, and while they should always be treated with respect, they are far from the defensive, high‑strung behaviour seen in some desert species. With proper conditions, they are hardy, long‑lived, and rewarding to observe — an excellent choice for keepers who appreciate naturalistic setups and the subtle behaviours of tropical scorpions.
 
O. asper thrives in warm, humid environments with plenty of structure and hiding places. Their manageable size, attractive appearance, and steady nature make them a lovely addition to any scorpion collection, especially for those looking to explore species beyond the more commonly kept Buthids.