Abstract Marine microalgae are a promising sustainable source of lipids, omega-3 fatty acids, and carbohydrates. Selected species belonging to the Bacillariophyceae, Haptophyceae, Eustigmatophyceae, Prasinophyceae were characterised for cellular content carbon nitrogen, production yields total carbohydrates, ?-glucans. Carbon nitrogen showed hyperbolic decrease with increasing cell numbers Chae...