Elasmobranchs are characterised by the presence of placoid scales on their skin. These scales. structurally homologous to gnathostome teeth. are thought to have various ecological functions related to drag reduction. https://www.ngetikin.com/super-value-1-2-in-Tobacco-Road-Acacia-Distressed-Engineered-Hardwood-Flooring-4-8-in-Wide-Sample-quick-super/