What is seaweed made of?

I bought some cuttlefish-flavoured chips in Guillotière today.


Check out the ingredients:

potato starch, artificial cuttlefish flavour, canola oil, soy-sauce, FD&C yellow No. 5, monosodium glutamate, allergy warning: contains cuttlefish, shrimp, wheat, soybean

Er...no seaweed? Then what's that black stuff stuck on the chips??

(The taste was seaweed all right...what I'm not sure about is whether they forgot to add "seaweed" to the ingredients or whether the "seaweed" could be made with those ingredients. Hmm...)