Its murder.

[Peregrinus]

Please, whales and dolphins are obviously higher-order mammals, like chimps, but nonetheless they are definitely 2D creatures in 2D vehicles - no matter how much we can relate to their intelligence and behavior.

Not according to Q'uo.

Q'uo states that whales and dolphins are 3D entities, like us.

That is correct. Q'uo said very clearly that at one time whales were 2D creatures, but those of Atlantis melded their spirits with dolphins, and as such remained in them. Eventually all whales became 3D vehicles.

According to the session 1981_1129

D: Speaking of the bottom of the ocean, what can you tell me about dolphins?

I am Latwii, and my brother, we can say many things about dolphins. We, of course, do not suppose to give biology lessons, but may remark in passing that the creatures which are known to you as dolphins are much more than animals which swim in the deep, for these creatures have, for many of your years, possessed the prize of the human form which is called the extension of the brain complex known as the frontal lobes, and, therefore, this creature does have the intelligence that exceeds many of your so-called second-density creatures, and is able to communicate with those of its own kind, and other entities as well, on a level which you may describe as telepathic.

There is more to this session, but I shall leave it to you to read the entire session at the link I provided above.