In the sea Okinawa public beach has a caution board to show the dangerous animals on the beach. Check the explanation before enter the water. Sea Snakes The okinawa sea snakes are about 1m long with striped pattern. If bitten, suck out the venom and immediately transport the victim to the hospital. Sea Snakes are not actively attack human, so if you see it, slowly go backward. Box Jelly fish It has a box-shaped bell about 10 cm in diameter and four arms with tentacles on each arm. Do not rub the sting. Rinse the affected area with vinegar to remove tentacles, cold pack or soak in cold water. See doctor immediately in case of serious condition. Stonefish it is about 40 cm long and looks like a rock with brown algae. If stung, soak in about 40-45 degree Celsius (104 to 113 Fahrenheit) It can be found on the coral rock area where the people walk on the rocks at the time of low tide. So it is good to wear marine shoes or sneaker when you stroll on the coral rocks instead of sandals. Long-Spined Sea-Urchin The long-spined sea-urchin has sharp spines of about 20 cm long. If stung, soak in about 40-45 degree Celsius (104 to 113 Fahrenheit). Its Japanese name Gangaze is a popular sea-urchin of Okinawa. It good to wear marine shoes for snorkeling. Lionfish The Lionfish isa about 25-35cm long and with long petal-like poisonous pectoral fins. If stung, soak in about 40-45 degree Celsius (104 to 113 Fahrenheit) ...