30 centimeters long
Small, silent, deadly arthropods, kouhuns are extremely poisonous creatures employed by assassins who don't want to be traced. They can be delivered remotely, and instinctively seek out the body heat of their target.
Zam Wesell employed a pair of kouhuns in an assassination attempt against Senator Padme Amidala. She stowed the creepy creatures aboard her ASN-121 droid, and dispatched the floating mechanical to Padme's Coruscant apartment. Cutting into her bedroom window, ASN-121 released its deadly cargo. A sudden burst of Force-intuition alerted protector Anakin Skywalker to the kouhuns' presence, and he stormed in and hacked the creatures to death with his lightsaber.
The kouhuns of Indoumodo are equipped with two means of delivering venom into their victims. Their mouthparts inject a fast-acting nerve-poison to kill their prey. Their tail-mounted stinger delivers a painful, but non-lethal, venom. Assassins employing kouhuns typically starve them in advance of their deadly assignments.
The kouhuns underwent a number of designs, including ones that were more spider-like in shape. Some designs explored the notion of transparent skin showcasing the poisonous venom that coursed underneath. One near final iteration included a more pronounced tail stinger, and it was this version that Hasbro used in developing action figure-scaled versions of the creature.