Venomous Black Fish is an unknown fish, reported from Shatt al Arab River, Iran and Iraq. Small and black. Lethal, swift-acting bite. Said to have killed twenty-eight people before 1975.
- Unknown relative of the Blackline fangblenny (Meiacanthus nigrolineatus), a blueand- yellow species with a black stripe along its dorsal fin, suggested by Karl Shuker. Found in the Red Sea and the Gulf of Aden, this fish has a nonfatal, venomous bite and is just under 4 inches long.
- The Stinging catfish (Heteropneustes fossilis), a black fish about 12 inches long with poisonous spines in its pectoral fins, has been introduced into the Shatt al Arab from the Indian subcontinent. Its bite is not dangerous, but its fins are.
- A Giant slender moray (Thyrsoidea macrura) from the Red Sea. This fish grows to 12 feet long, and its bites have never proven fatal.