Fish bone is considered as a potential source of calcium. Fish bonematerial derived from processing of large fish is a useful calciumsource. To use fish bone as a calcium fortificant, the bone should beconverted into an edible form by softening its structure. Fish bonepowder is a potential value-added by-product of the tuna processingindustry. The calcium containing powder from fish bone could be usedfor the fortification of fish products such as surimi (Shungan, 1996).