Abstract
The behaviours of fish in response to the sound stimuli were observed by using the fire-work under the water and by striking the bottom of the cask as the source of sound. It is now made clear that the critical sound-intensity to affect the bahaviours of fish varies from one species to the next, and mackerel, (Scomber japonicus) and horse mackerel (Trachurus japonicus) are rather sensitive fish, but conger eels except Rhyncocymba nystromi nystromi are less sensitive.
