In a field study assessing northern elephant seal pups, necropsies were performed on 18 pups. Six had a previously unrecognized myopathy characterized by white streaks in the muscles of the abdominal wall. A cause for the myopathy was not identified.
Spraker, T.R., Kuzmina, T.A., Lyons, E.T., DeLong, R.L., Simeone, C. and Veeramachaneni, D.R., 2019. Multifocal Necrotizing Myopathy in Northern Elephant Seal (Mirounga angustirostris) Pups, San Miguel Island, California. Veterinary Pathology, 56(1), pp.143-151.