Lionfish

The Red Lionfish is only found in tropical coral reefs of the Indo-Pacific. It has poison glands at the base of the spines of its dorsal, anal and pelvic fins. When faced with danger, the fish erects the dorsal fins and points the toxic spines toward the perceived or actual enemy. In humans, the sting causes immediate pain that soon becomes unbearable and can last over many hours. Other symptoms include circulatory and respiratory problems. While the sting usually is not life-threatening, the tissue swelling may persist for weeks.