The animal had a long, streamlined body with heavy limbs, suggesting it had well-developed muscles. It had a long tail and likely moved much more easily over land than modern seals. It was little longer than a cat from the tip of its nose to the tip of its tail (about 110 centimetres). It didn’t have flippers, but had flattened digits that suggest webbed feet. Its canine teeth were large, indicating a meat eater, and it had a short snout and muscular jaw.