Effect of cooking on nutrient composition and anticancer indoles of the marine whelk Dicathais orbita – Can it be another high-value seafood product?

•Dicathais orbita is an under utilised marine whelk with functional food potential.•The raw and cooked meat has a high protein content with essential amino acids.•The low lipid content is dominated by polyunsaturated fatty acids.•It produces anticancer brominated indoles that can be retained after boiling.