Marine polychaete worms Leocratides kimuraorum that live off the East coast of the Japanese island of Honshu, was able to produce the loudest sound among the worms and one of the loudest among the sea creatures. This was stated by the biologists from the University of Alberta.
According to the researchers, two of the worm, appearing at a small distance from each other, with our mouths interlock and produce a loud clicking sound. This is due to the fact that the back part of the pharynx of the worms very quickly swelled, and then the water is quickly thrown away and repelled by such individual. In a similar way between “interacted” with each other regardless of gender worms, and scientists are not yet ready to call the role of such actions.
The volume published in this sound is from 140 to 157 decibels, which is comparable with the roar of the turbines of an airplane taking off. While 120 decibels is the pain threshold of the person. The largest of all existing animals, the blue whale, is able to produce sounds with a capacity of up to 188 decibels, however, these giants can reach 25 meters in length, while the length Leocratides kimuraorum is only about three inches, that is almost a hundred times smaller.
Experts say that Leocratides kimuraorum were the first known marine animals without hard body parts, capable of producing so loud a sound.
A study of the unusual behavior of the worm, was published in the journal Current Biology.
A year and a half ago, other experts have published and posted on the Internet is deafening “song” fish — creatures that in the minds of many people are a symbol of silence. Source of noise that may pose a real threat to the hearing of marine life, became Mexican Corvina, Cynoscion othonopterus, or. According to scientists, fish in the Gulf of California, in the mating season emit a series of special sounds designed to attract a partner. Even the “voice” of each individual fish sounds pretty loud, the researchers note, but the really deafening sound is when many Mexican Corwin encourage females at the same time. Once a year hundreds of thousands of these animals are collected in one place, their “choir” is the loudest known sounds produced by fishes, and probably one of the most notorious “manifestations” of wildlife on the planet as a whole. Its volume reaches 150 decibels