Underwater there is very little known about the soundscapes created by living creatures, and few understand the details of variations between the various grunts, knocking sounds and rumbling sounds that cod, haddock, pollock, other fish and crustaceas produce, and how they experience and orientate themselves through the use of sound. Recorded by Jana Winderen (who also provided the illustration) 'The Noisiest Guys on the Planet' is an ongoing investigation into the use and production of sound by decapods. The decapods or Decapoda (literally means 'ten footed') are an order of crustaceans within the class Malacostraca, including many familiar groups, such as crayfish, crabs, lobsters, prawns and shrimp.