In the latest Journal of Fish Biology, the U.S. research team analyzed public images from the National Oceanic and Atmospheric Administration (NOAA) and found for the first time that the deep-sea fish "Coffinfish" "held its breath" in the water for up to 4 minutes. For the particular behavior of the Cofen fish, the researchers speculate that it may be related to self-preservation.
The Journal of Fish Biology reported that Farina, an assistant professor in the Department of Biology at Harvard University, and Lang En, a biologist at Dickinson College in Pennsylvania, observed the "breath-holding" behavior of Cofenfish for the first time when collating public images taken by the National Oceanic and Atmospheric Administration (NOAA) remote control vehicle.
Generally speaking, in order to obtain the oxygen needed, fish will suck water from their mouths, extract oxygen from the water, and then discharge the water that lacks oxygen through the gills, but the Cofen fish sucks the seawater into the mouth and retains the seawater in the gill chamber for 26 seconds to 4 minutes. The researchers speculated that the behavior may be to conserve strength, or to make the body appear larger than the predator for protection.
The research team also performed computed tomography (CT) scans of museum specimens of The Cofen fish, measuring how much water the gills could hold. In addition, studies have shown that when the Cofen fish "hold their breath" in the water, the maximum volume can increase to about 30% of the original size.
The Scientific Name "En's Single Spiny Fish", also known as coffin fish, toadfish, they inhabit the deepest part of the Pacific Ocean, have a soft body and long tail, the body is covered with small spines, the maximum can grow up to 10 cm.
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