Fillets of deep-skinned orange roughy (Hoplostethus atlanticus) were found to contain 5.46% total lipids consisting of as much as 93% non-digestible wax esters. The fillets therefore act as a mild laxative, which probably contributes to their popularity on the American and Japanese markets. In addition, the fillets had remarkably low levels of cholesterol and phospholipids (seemingly irreplaceable constituents of cell membranes) of 0.033% and 0.17%, respectively. Keywords: Hoplostethus atlanticus, Fish species, Wax esters, Phospholipids, Non-phosphorylated lipids, Food sciences.