A wave transmission control device to perform control of a transmitter to form a sound field in water, the wave transmission control device comprising: a determination unit configured to, when detection information is input from a sensor to detect an underwater organism in water, perform determination of a characteristic of the underwater organism among a plurality of characteristics and a distribution state of the underwater organism in water for said characteristic using the detection information, wherein the plurality of characteristics includes the type, size, and degree of growth of the underwater organism; a sound information database which is communicably connected to the wave transmission control device and in which the plurality of characteristics and a plural pieces of sound information are respectively associated with each other, a sound selection unit configured to acquire sound information based on the characteristic determined by the determination unit by referring to the sound information database ; and a wave-transmission control unit configured to determine a sound output condition in such a manner that a distribution state of the underwater organism in water changes from the distribution state of the underwater organism in water determined by the determination unit to a set distribution state of the underwater organism in water which is set for said characteristic of the plurality of characteristics received before processing starts, and to cause the transmitter to output a sound based on the sound information acquired by the sound selection unit using the sound output condition, wherein the wave-transmission control unit is configured to cause the transmitter to output a preference sound preferred by a first type of underwater organism and a repellent sound which is different from the preference sound and avoided by a second type of underwater organism. a determination unit configured to, when detection information is input from a sensor to detect an underwater organism in water, perform determination of a characteristic of the underwater organism among a plurality of characteristics and a distribution state of the underwater organism in water for said characteristic using the detection information, wherein the plurality of characteristics includes the type, size, and degree of growth of the underwater organism; a sound information database which is communicably connected to the wave transmission control device and in which the plurality of characteristics and a plural pieces of sound information are respectively associated with each other, a sound selection unit configured to acquire sound information based on the characteristic determined by the determination unit by referring to the sound information database ; and a wave-transmission control unit configured to determine a sound output condition in such a manner that a distribution state of the underwater organism in water changes from the distribution state of the underwater organism in water determined by the determination unit to a set distribution state of the underwater organism in water which is set for said characteristic of the plurality of characteristics received before processing starts, and to cause the transmitter to output a sound based on the sound information acquired by the sound selection unit using the sound output condition, wherein the wave-transmission control unit is configured to cause the transmitter to output a preference sound preferred by a first type of underwater organism and a repellent sound which is different from the preference sound and avoided by a second type of underwater organism. <EOS>