The Iranian naval deployment could also be to protect a shipment from North Korea(if you get my drift). But fear not...Obama is busy writing his letter to the UN Security Council. (eye roll)
I don’t think a shipment to Iran directly from North Korea would come through Gulf of Aden ...
maybe indirectly, like something flown into Syria, and then delivered via the Suez by ship
Or maybe Iran will be protecting something arriving via a Kenya connection- Iran-Kenya talks have been “curious”?
Or as others have suggested, an arms shipment to Hamas