diff --git a/src/api/items/behavior/index.ts b/src/api/items/behavior/index.ts
new file mode 100644
index 0000000..8cf61eb
--- /dev/null
+++ b/src/api/items/behavior/index.ts
@@ -0,0 +1,5 @@
+export const itemBehaviorMap: TItemBehaviorMap = {};
+
+export function addItemBehavior(itemID: string, bhv: TItemBehavior) {
+    itemBehaviorMap[itemID] = bhv;
+}
diff --git a/src/api/items/behavior/items/fish.ts b/src/api/items/behavior/items/fish.ts
new file mode 100644
index 0000000..e69de29