1. Provide nurseries and service boats for the transportation and storage of fish or other aquatic organisms, including (a) at least one exchangeable floating closed floating floating floating floating floating floating floating floating floating floating floating floating floating floating floating floating floating floating floating floating floating floating floating floating floating floating floating floating floating floating floating floating floating floating floating floating floating floating floating floating floating floating floating floating floating floating floating floating floating floating floating floating floating floating floating floating floating floating floating floating floating floating floating floating floating floating floating floating floating floating floating floating floating floating floating floating floating floating floating floating floating floating floating floating floating floating (b) A propulsion device, including orientation and positioning devices, and a ballast system to raise or lower such propulsion device in water; a method.DISPOSICION DE BUQUE VIVERO Y BARCO DE SERVICIO PARA TRANSPORTE Y ALMACENAMIENTO DE PECES U OTROS ORGANISMOS ACUATICOS QUE COMPRENDE A)AL MENOS UNA UNIDAD DE ESTANQUE CERRADO INTERCAMBIABLE FLOTANTE; Y B)UNA UNIDAD DE PROPULSION QUE INCLUYE MEDIOS DE DIRECCIONAMIENTO Y POSICIONAMIENTO Y UN SISTEMA DE LASTRE PARA ELEVAR O BAJAR DICHA UNIDAD DE PROPULSION EN EL AGUA; METODO.