KARACHI - Blue bottles are no longer to be considered as life threatening, as it was previously largely believed. It is now considered a myth in the local terms. Though, deaths have been reported due to the venomous sting of the blue bottle, it is highly asserted one in a thousand. Blue bottles have another slightly different name, called Portuguese Man O' War. Blue bottles are usually found on the coast of Karachi, and some other regions of the world, namely northern side of the Gulf of Mexico and even Florida. It is rare that only a single Portuguese Man O' War is found; the discovery of one usually indicates the presence of many as they can "swarm" in groups of thousands. Attitudes to the presence of the Portuguese Man O' War vary around the world. Given their sting, they must be treated with caution and the discovery of a number of blue bottles washed up on the beach which might lead to the closure of a whole beach. The treatment with caution relies the fact that blue bottles sting can lead to the fact of severe pain to humans, leaving whip-like, red welts on the skin which normally last about 2-3 days after the initial sting, the pain should subside after about one hour. However, the poison can travel to the lymph nodes and may cause more intense pain, depending on the amount of venom. A sting may lead to an allergic reaction. There can also be serious effects including fever, shock and interference with heart and lung action. There have even been deaths, although its rare. Medical attention may be necessary, especially where pain persists or is intense, or there is an extreme reaction, or a feeling of overall illness develops, or a red streak develops between swollen lymph nodes and the sting, or if either area becomes red, warm and tender. If one blue bottle is found on the beach, the actual incident portrays that a large number must have swarm in groups towards the coast line. But, even blue bottles have its enemies likewise the Loggerhead Turtle that feeds on the Portuguese Man O' War; indeed it is a common part of its diet. The skin of the turtle is too thick for the Portuguese Man O' War sting to penetrate and launch its venom. Secondly, the Black Octopus is immune to the venom of the blue bottle and the female has been known to rip off its tentacles and use them for defensive purposes.