text: are all fish fins considered kosher? e. g. if a shark would have kosher scales would its fins disqualify it? i would imagine that the shark's fins are not actually a kosher sign because they resemble limbs. they are completely unlike the fins seen on small fish that are commonly eaten such as herring, sardines, and salmon. in this vein, what are the fins of a tuna fish subset like? do they resemble a salmon's or a shark's? varies from both.