diff --git a/application/src/Api/Representation/AbstractRepresentation.php b/application/src/Api/Representation/AbstractRepresentation.php
index e0b22e7d5..d9246d331 100644
--- a/application/src/Api/Representation/AbstractRepresentation.php
+++ b/application/src/Api/Representation/AbstractRepresentation.php
@@ -97,7 +97,7 @@ public function primaryMedia()
     /**
      * Get one thumbnail of this representation.
      *
-     * @return Asset
+     * @return AssetRepresentation
      */
     public function thumbnail()
     {
diff --git a/application/src/Api/Representation/MediaRepresentation.php b/application/src/Api/Representation/MediaRepresentation.php
index c47280dbd..063df55d2 100644
--- a/application/src/Api/Representation/MediaRepresentation.php
+++ b/application/src/Api/Representation/MediaRepresentation.php
@@ -60,48 +60,24 @@ public function originalUrl()
      *
      * @param string $type The type of thumbnail
      * @return string
+     *
+     * @uses \Omeka\File\ThumbnailManager::thumbnailUrl()
      */
     public function thumbnailUrl($type)
     {
-        $thumbnailManager = $this->getServiceLocator()->get('Omeka\File\ThumbnailManager');
-
-        if (!$this->hasThumbnails() || !$thumbnailManager->typeExists($type)) {
-            $fallbacks = $thumbnailManager->getFallbacks();
-            $mediaType = $this->mediaType();
-            $topLevelType = strstr((string) $mediaType, '/', true);
-
-            if (isset($fallbacks[$mediaType])) {
-                // Prioritize a match against the full media type, e.g. "image/jpeg"
-                $fallback = $fallbacks[$mediaType];
-            } elseif ($topLevelType && isset($fallbacks[$topLevelType])) {
-                // Then fall back on a match against the top-level type, e.g. "image"
-                $fallback = $fallbacks[$topLevelType];
-            } else {
-                $fallback = $thumbnailManager->getDefaultFallback();
-            }
-
-            $assetUrl = $this->getServiceLocator()->get('ViewHelperManager')->get('assetUrl');
-            return $assetUrl($fallback[0], $fallback[1], true, false, true);
-        }
-        return $this->getFileUrl($type, $this->storageId(), 'jpg');
+        return $this->getServiceLocator()->get('Omeka\File\ThumbnailManager')->thumbnailUrl($this, $type);
     }
 
     /**
      * Get all thumbnail URLs, keyed by type.
      *
      * @return array
+     *
+     * @uses \Omeka\File\ThumbnailManager::thumbnailUrls()
      */
     public function thumbnailUrls()
     {
-        if (!$this->hasThumbnails()) {
-            return [];
-        }
-        $thumbnailManager = $this->getServiceLocator()->get('Omeka\File\ThumbnailManager');
-        $urls = [];
-        foreach ($thumbnailManager->getTypes() as $type) {
-            $urls[$type] = $this->thumbnailUrl($type);
-        }
-        return $urls;
+        return $this->getServiceLocator()->get('Omeka\File\ThumbnailManager')->thumbnailUrls($this);
     }
 
     /**
diff --git a/application/src/File/ThumbnailManager.php b/application/src/File/ThumbnailManager.php
index ebf2869bb..f1c23e587 100644
--- a/application/src/File/ThumbnailManager.php
+++ b/application/src/File/ThumbnailManager.php
@@ -2,6 +2,7 @@
 namespace Omeka\File;
 
 use Laminas\ServiceManager\ServiceLocatorInterface;
+use Omeka\Api\Representation\MediaRepresentation;
 
 class ThumbnailManager
 {
@@ -26,6 +27,55 @@ public function __construct(ServiceLocatorInterface $services)
         $this->config = $config['thumbnails'];
     }
 
+    /**
+     * Get the URL to a thumbnail image of a media.
+     *
+     * @param MediaRepresentation $media
+     * @param string $type The type of thumbnail
+     * @return string
+     */
+    public function thumbnailUrl(MediaRepresentation $media, $type)
+    {
+        if (!$media->hasThumbnails() || !$this->typeExists($type)) {
+            $fallbacks = $this->getFallbacks();
+            $mediaType = $media->mediaType();
+            $topLevelType = strtok((string) $mediaType, '/');
+
+            if (isset($fallbacks[$mediaType])) {
+                // Prioritize a match against the full media type, e.g. "image/jpeg"
+                $fallback = $fallbacks[$mediaType];
+            } elseif ($topLevelType && isset($fallbacks[$topLevelType])) {
+                // Then fall back on a match against the top-level type, e.g. "image"
+                $fallback = $fallbacks[$topLevelType];
+            } else {
+                $fallback = $this->getDefaultFallback();
+            }
+
+            $assetUrl = $this->getServiceLocator()->get('ViewHelperManager')->get('assetUrl');
+            return $assetUrl($fallback[0], $fallback[1], true, false, true);
+        }
+
+        return $media->getFileUrl($type, $media->storageId(), 'jpg');
+    }
+
+    /**
+     * Get all thumbnail URLs of a media, keyed by type.
+     *
+     * @param MediaRepresentation $media
+     * @return array
+     */
+    public function thumbnailUrls(MediaRepresentation $media)
+    {
+        if (!$media->hasThumbnails()) {
+            return [];
+        }
+        $urls = [];
+        foreach ($this->getTypes() as $type) {
+            $urls[$type] = $this->thumbnailUrl($media, $type);
+        }
+        return $urls;
+    }
+
     /**
      * Build a thumbnailer object.
      *