Fish The space under the floating structure is where fishes can stay comfortably and the attached organism on the sidewall and bottom is useful for the growth of fishes. Sound in Water and Fishes Through the observation and investigation on the behavior of fishes to the various kinds of sound under the floating structure in The Experiment, it is confirmed that little impacts are found in the behavior of fishes by the sound in the water which diminishes with the distance from the floating structure except just adjacent to it.