I thought the Mahdi
When we think of the loud sounds underwater, we recall the high sounds of many aquatic animals, including mammals, fish, crustaceans and insects.
But we do not expect a small 29-mm marine worm with a soft body to produce distinctive loud sounds, because issuing such sounds requires sophisticated energy mechanisms to store and release them.
Sounds loud during the fighting
A recent study published in the journal Carnet Biology on July 9, 2019, revealed leukaratidis kimuraworm-type marine worms that emit loud loud noises during repeated behavior called "oral combat."
Marine biologist Ryutaro Goto and his colleagues at the University of Kyoto have measured the intensity of these small mollusks.
They found that the pressure of those sounds was up to 157 dB, an estimated 1 μp per meter, and it was accompanied by frequencies within 1 - 100 kHz, and a strong signal at 6.9 kHz.
To understand the meaning of these frequencies, you can imagine that humans can hear as low as 10 decibels, but sounds become painful and harmful to our ears when they reach 130 dB.
The sound of shrimp is capable of breaking glass
These small helminths can be compared to those produced by shrimp when caught for prey, which is one of the most densely measured biological sounds in the sea.
The shrimp produce a sound of up to 189 decibels to catch its prey and catch them, and researchers estimate that this noise can break a sheet of glass.
Suggested scenario for loud voice
The study team suggested a new scenario for interpreting the mechanism of generating these high-velocity movements and high-pitched sounds from that thin animal.
The researchers hypothesized that thick, thick walls of the throat act to store energy and provide the momentum needed to release such sounds.
This allows for rapid and large expansion of the pharynx inside the worm's body during oral combat, resulting in an intense crackling sound (possibly through the cavity) accompanied by a rapid flow of water.
It is likely that these animals with soft bodies, which were not known by their high voices before, these sounds may be used for qualitative communication between them.
The mechanism of issuing this sound remains a fascinating mystery. This study has developed a possible explanation, a discovery that promises a new kind of radical biology that calls for more intensive research and analysis to solve its mysteries.
The worms were first classified in 2017, where they live in marine sponges along the Pacific coast of Japan, waiting for their prey there, and vigorously defending their hideout there.