Fat-tailed scorpions out of North Africa and the Middle East, and the genus most responsible for the general rule that thin pincers plus a thick tail means dangerous.
The venom is medically significant and in some species potentially lethal without treatment. A. australis and A. crassicauda have both caused human fatalities in their native ranges. These are not display animals for a shared household and anyone keeping them should know where the nearest antivenom actually is.
Arid, fast, and defensive, with a strike that is genuinely quicker than most keepers anticipate. Supply is largely wild-caught and moves with North African import cycles, so prices swing seasonally and availability of specific species is unreliable. Captive breeding exists but does not buffer supply.