Okay, the user wants me to translate "canal boats" into Japanese. Let me think about the correct term here. "Canal boats" are vessels that navigate canals, so the direct translation would be something like "運河の船" (un'ga no funa). But maybe there's a more standard term used in Japanese.
I should check if there's a specific term for canal boats. In Japanese, "canal boat" is often translated as "運河船" (un'ga sen). Wait, "sen" can mean ship or boat, so "運河船" would be "canal ship" or "canal boat." That seems accurate. Alternatively, "運河の船" is more literal, meaning "ship of the canal."
But the user's instruction says if the content is already in Japanese, output it unchanged. Since "canal boats" is in English, I need to translate it. The user also wants only the translation result with no explanations. So I should just provide the translated term without any extra text. Let me confirm once more. The correct translation is likely "運河船" (un'ga sen). Yeah, that's the standard term. I'll go with that.