I'm not confusing anything. The comment I'm replying to states "When have you last yelled at someone to place the 3D image of a swarm of krill in their minds?".

I'm not confusing anything. The comment I'm replying to states "When have you last yelled at someone to place the 3D image of a swarm of krill in their minds?". Well, irrespective of what whales actually understand of their 3d environment based on echolocation, they are certainly not "putting that 3d image in another whales mind just by yelling it." The bandwidth of their communication channel is to small for that. At best, they might be encoding driving directions to krill and/or mates. Therefore the comment I was replying to was obviously and absurdly generous in its interpretation of whale brain capabilities. Even believing they do point cloud echolocation is a bit generous considering what whales actually need to accomplish. A low resolution 3d blob cloud (in contrast to point cloud) would be all the comprehension of the world they might ever need. Unlike bats, whales don't have to track down and catch the krill after reaching them.