I'm getting a game launch error similar to the Seabloom Agriculture one; it looks like your mod and Pyanodon's both want to claim Seaweed.
"prototype 'seaweed' registered twice"
Perhaps yours could be called "nori", given it's only for sushi, right?

On another note, is it possible for one player to disable hunger in multiplayer? I'm looking forward to trying your mod, but my co-op friend might not want to deal with the hunger upkeep. Is it possible to eat from a certain slot automatically, kind of like how fuel is used in machines?

Took the suggestion and renamed seaweed to Nori. Should be working now.

It's not currently possible for one player to use hunger and not another. I can try and figure this out in the future though. I like the idea of an auto food slot. Maybe even an external slot near the ammo. I'll also try and figure that one out.