diff --git a/frontend/src/hooks/useKoreaFilters.ts b/frontend/src/hooks/useKoreaFilters.ts
index 2bbec27..bdfcf2d 100644
--- a/frontend/src/hooks/useKoreaFilters.ts
+++ b/frontend/src/hooks/useKoreaFilters.ts
@@ -307,8 +307,11 @@ export function useKoreaFilters(
     if (!anyFilterOn) return visibleShips;
     return visibleShips.filter(s => {
       const mtCat = getMarineTrafficCategory(s.typecode, s.category);
-      if (filters.illegalFishing && mtCat === 'fishing' && s.flag !== 'KR') return true;
-      if (filters.illegalFishing && (analysisMap?.get(s.mmsi)?.algorithms.riskScore.level === 'CRITICAL' || analysisMap?.get(s.mmsi)?.algorithms.riskScore.level === 'HIGH')) return true;
+      if (filters.illegalFishing) {
+        if (mtCat === 'fishing' && s.flag !== 'KR') return true;
+        const riskLevel = analysisMap?.get(s.mmsi)?.algorithms.riskScore.level;
+        if (mtCat === 'fishing' && (riskLevel === 'CRITICAL' || riskLevel === 'HIGH')) return true;
+      }
       if (filters.illegalTransship && transshipSuspects.has(s.mmsi)) return true;
       if (filters.darkVessel && darkVesselSet.has(s.mmsi)) return true;
       if (filters.cableWatch && cableWatchSet.has(s.mmsi)) return true;