Some years back Proceedings had a short interesting article by a CIA contractor training dolphins for use in Vietnam. The navy took over the project and he went elsewhere. Near the end of the project he gave up using special codes to one dolphin and simply used morse code for the commands, he then noticed that dolphin teaching? another dolphin morse code. That’s when the navy took over and he went to another job. Does anyone know of any follow up to the idea of one dolphin training another in morse code or anything else?