diff --git a/webui/static/core.js b/webui/static/core.js
index 92297d45..426db439 100644
--- a/webui/static/core.js
+++ b/webui/static/core.js
@@ -465,7 +465,13 @@ function initializeWebSocket() {
     // Phase 5 event listeners (sync/discovery progress + scans)
     socket.on('sync:progress', (data) => updateSyncProgressFromData(data));
     socket.on('discovery:progress', (data) => updateDiscoveryProgressFromData(data));
-    socket.on('scan:watchlist', (data) => updateWatchlistScanFromData(data));
+    socket.on('scan:watchlist', (data) => {
+        updateWatchlistScanFromData(data);
+        const watchlistBtn = document.querySelector('.nav-button[data-page="watchlist"]');
+        if (watchlistBtn) {
+            watchlistBtn.classList.toggle('nav-watchlist-scanning', data.status === 'scanning');
+        }
+    });
     socket.on('scan:media', (data) => updateMediaScanFromData(data));
     socket.on('wishlist:stats', (data) => updateWishlistStatsFromData(data));
     // Phase 6: Automation progress
diff --git a/webui/static/style.css b/webui/static/style.css
index 7b1a32d3..b062f60f 100644
--- a/webui/static/style.css
+++ b/webui/static/style.css
@@ -449,6 +449,36 @@ body {
     color: rgba(var(--accent-rgb), 0.7);
 }
 
+.nav-button.nav-watchlist-scanning .nav-icon {
+    animation: watchlist-scan-glow 1.6s ease-in-out infinite;
+}
+
+.nav-button.nav-watchlist-scanning .nav-svg {
+    animation: watchlist-scan-svg 1.6s ease-in-out infinite;
+}
+
+@keyframes watchlist-scan-glow {
+    0%, 100% {
+        box-shadow:
+            0 2px 4px rgba(0, 0, 0, 0.15),
+            inset 0 1px 0 rgba(255, 255, 255, 0.06),
+            0 0 6px rgba(var(--accent-rgb), 0.25);
+        border-color: rgba(var(--accent-rgb), 0.2);
+    }
+    50% {
+        box-shadow:
+            0 2px 8px rgba(0, 0, 0, 0.2),
+            inset 0 1px 0 rgba(255, 255, 255, 0.08),
+            0 0 14px rgba(var(--accent-rgb), 0.55);
+        border-color: rgba(var(--accent-rgb), 0.5);
+    }
+}
+
+@keyframes watchlist-scan-svg {
+    0%, 100% { opacity: 0.7; }
+    50% { opacity: 1; filter: drop-shadow(0 0 3px rgba(var(--accent-rgb), 0.8)); }
+}
+
 .nav-button:hover .nav-icon {
     color: rgba(255, 255, 255, 0.95);
     background: linear-gradient(135deg,