Published on: 2026-07-26
Deep Ocean and Marine Biology
Deep in the dark, high pressure zones of the ocean, which bizarre ability do some grenadier fish possess to navigate and find prey?
Correct
These rugged deep sea dwellers have a cool party trick: they purposefully drum on their swim bladders with specialized muscles to produce low frequency sounds that bounce off the seafloor, acting like a natural sonar. Bats are terrestrial acrobats and their sonar would be useless in the dense, pressurized water. Electric eels are strictly freshwater masters of the Amazon, so they are not hanging out in the deep ocean for the fish to track. Finally, ultraviolet light is absorbed almost instantly by water, making it a terrible flashlight for a fish trying to see anything at all in the midnight zone.