The skull is so remarkably whale like, that when the first one was found (without the postcranial skeletion) paleontologists assumed it had a body adapted to the water.
Some people see what they want to see.
It turned out to be one of the several predicted ungulate/whale transitionals. It had a long whale-like skull with whale teeth. It had the auditory bullae found only in whales. Its bones were osteosclerotic, providing ballast for living in water, and the eyes were high on the skull, allowing it to be mostly submerged, but still able to see above water.
The first exotic drawings of the "aquatic" Pakicetus (left), were based on the highlighted skull and jaw fragments (right):
But with the 2001 discovery of a mostly complete skeleton, we are able to put the so-called Pakicetus into perspective:
1) no blowhole
2) no flippers (only hooves)
3) no whale-like neck (typical land-animal neck)
4) no whale-like ear bone (plate-like sigmoid process)
5) not aquatic.
There is not a lot of "whale" left. The discoverer of the mostly complete skeleton, J. G. M. Thewissen, a colleague and former student of Gringrich, wrote in Nature:
"Taken together, the features of the skull indicate that pakicetids were terrestrial, and the locomotor skeleton displays running adaptations. Some features of the sense organs of pakicetids are also found in aquatic mammals, but they do not necessarily imply life in water. Pakicetids were terrestrial mammals, no more amphibious than a tapir." [J. G. M. Thewissen, "Skeletons of terrestrial cetaceans and the relationship of whales to artiodactyls." Nature Vol 413, 20 Sept 2001, p.278]
In the same issue of Nature is a critique of Thewissen's discovery, which includes:
"Thewissen and colleagues' discovery allows us to address both of these problems. The newly found fossils include several skulls and postcranial bones from two early pakicetid species — which, it seems, had the head of a primitive cetacean (as indicated by the ear region) and the body of an artiodactyl. All the postcranial bones indicate that pakicetids were land mammals, and it is likely that they would have been thought of as some primitive terrestrial artiodactyl if they had been found without their skulls. Many of the fossils' features — including the length of the cervical vertebrae, the relatively rigid articulations of the lumbar vertebrae, and the long, slender limb bones — indicate that the animals were runners, moving with only their digits touching the ground." [Christian de Muizon, "Walking with whales." Nature Vol 413, 20 Sept 2001, p.260]
Like I said, there is not a lot of whale to be found. But that does not prohibit the highly imaginative evolutionism crowd from pretending it is "whale-like". Just saying . . .
Pretty much the predicted transitional that creationists claimed could not exist.
Still saying . . .
Dan