diff --git a/jupyterbook/content/code_gallery/data_access_notebooks/2026-08-25PACE-OBIS.ipynb b/jupyterbook/content/code_gallery/data_access_notebooks/2026-08-25-PACE-OBIS.ipynb
similarity index 100%
rename from jupyterbook/content/code_gallery/data_access_notebooks/2026-08-25PACE-OBIS.ipynb
rename to jupyterbook/content/code_gallery/data_access_notebooks/2026-08-25-PACE-OBIS.ipynb
diff --git a/jupyterbook/content/code_gallery/gallery.md b/jupyterbook/content/code_gallery/gallery.md
index 82f77d36..82f62fe3 100644
--- a/jupyterbook/content/code_gallery/gallery.md
+++ b/jupyterbook/content/code_gallery/gallery.md
@@ -275,6 +275,21 @@
 <img src="../images/2024-09-17-CKAN_API_Query.png"/>
 :::
 
+:::{grid-item-card} Investigating PACE and OBIS as a data source for phytoplankton observations
+:margin: 3 0 0 0
+:link: ./data_access_notebooks/2026-08-25-PACE-OBIS.html
+:link-type: url
+:text-align: center
+:shadow: md
+
+{bdg-primary}`PACE`
+{bdg-secondary}`OBIS`
+{bdg-info}`python`
+^^^
+
+<img src="../images/2026-08-25-PACE-OBIS.png"/>
+:::
+
 :::{grid-item-card} Parsing Conventions and standards with Python
 :margin: 3 0 0 0
 :link: ./data_analysis_and_visualization_notebooks/2016-11-16-CF-UGRID-SGRID-conventions.html
diff --git a/jupyterbook/content/images/2026-08-25-PACE-OBIS.png b/jupyterbook/content/images/2026-08-25-PACE-OBIS.png
new file mode 100644
index 00000000..c2aca9d4
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