diff --git a/image-credits.txt b/image-credits.txt
index 8e5dee5..cdbef5b 100644
--- a/image-credits.txt
+++ b/image-credits.txt
@@ -1143,3 +1143,4 @@ http://commons.wikimedia.org/wiki/Amethyst#mediaviewer/File:GuerreroAm%C3%A9thys
 http://commons.wikimedia.org/wiki/File:Melting_Icicle_Structure.jpg
 http://commons.wikimedia.org/wiki/File:Ice_crystals.JPG
 http://commons.wikimedia.org/wiki/File:Zirconium_carbide_ZrC.jpg
+http://commons.wikimedia.org/wiki/File:Algae-oxygen-bubbles.jpg