Cetacean experts: Wikipedia alludes to the possibility that dolphins can transmit actual images of their surroundings to other dolphins using ultrasound. To what extent is this true?

This is in addition to dolphins' well established use of ultrasound for 'personal' navigation. The interesting idea here is that they might be able to beam visual representations of objects to other individuals. Could we intercept and decode these messages and obtain a dolphin's mental picture of an object that it has observed? link here