Remingtonocetids have long and narrow skulls with the external
nare openings located on the front of the skull. Their
frontal shields are narrow and their orbits small. Their mouth has a convex
palate and an incompletely fused
mandibular symphysis. The dental formula is . The anterior teeth are flattened mediolaterally, making them appear shark-like. In the
postcranial skeleton, the
cervical vertebrae are relatively long and the
sacrum is composed of four vertebrae of which at least three are fused. The
acetabular notch is narrow or closed and on the
femoral head the
fovea is absent. With long and low bodies, relatively short limbs, their elongated
rostrum, remingtonocetids looked like mammalian crocodiles, more so than
Ambulocetus. They could both walk on land and swim in the water and most likely lived in a near-shore habitat. At least one genus,
Dalanistes, had a marine diet. Remingtonocetids are often found in association with catfish and crocodilians, as well as
protocetid whales and
sirenians. They were probably independent of freshwater. ==Distribution==