Adventure Ausrama Blog

Jellyfish are spineless little devils. I do mean that in a good way. They are the most efficient swimmers on Earth, pulling their way forward rather than pushing. The "immortal jellyfish" rises phoenix-like from the dead. When it dies the decomposing body puts out stolon stalks which become babies. They are rapidly increasing in the world's oceans due mainly to Man. Most variations breed under man-made marine structures such as piers. The killing off of predatory fish for human food allows the transparent creatures to vastly increase in number. Cyaneidae have caused many problems over the years. Those going for a swim regularly get stung. In 2006 the seemingly invulnerable USS Ronald Reagan was put out of action by masses of jellyfish clogging the cooling system. Power plants and desalination facilities have also been stalled. Two million workers became unemployed when the comb jelly native to North America invaded the Black Sea in 1980 and destroyed anchovy

There has been a breakthrough in the research on box jellyfish. They have thousands of stinging cells on their ten-foot long tentacles. New discoveries have been made into their evolution. This will help in finding antivenom and new treatment for stings to humans. Some species of jelly fish have good sight: they have 24 eyes, can sense light and form images of their surroundings. Little is known, however, about what they actually see. They don't need to see to mate. Females and males just get together and fertilize eggs in a mass spawning, though some species do appear to mate one-on-one. The most dangerous jelly fish, in Australia, is the Box Jellyfish (sea wasp or stinger). Some can immobilize while others can kill. The Portuguese man of war is held to be very dangerous, but despite its name it cannot kill humans. Chironex flecken , an Australian box jellyfish, can be lethal. A similar type, Chironex yamaguchii , has killed people in Japan. Evolution of jellyfish has been p