diff --git a/planet/controllers/expression_cluster.py b/planet/controllers/expression_cluster.py
index dd8e570..63137ae 100644
--- a/planet/controllers/expression_cluster.py
+++ b/planet/controllers/expression_cluster.py
@@ -163,6 +163,14 @@ def avg_profile(cluster_id):
     return Response(json.dumps(avg_profile), mimetype='application/json')
 
 
+@expression_cluster.route('/tooltip/<cluster_id>')
+@cache.cached()
+def cluster_tooltip(cluster_id):
+    current_cluster = CoexpressionCluster.query.get(cluster_id)
+
+    return render_template('tooltips/cluster.html', cluster=current_cluster)
+
+
 @expression_cluster.route('/ajax/interpro/<cluster_id>')
 @cache.cached()
 def cluster_interpro_ajax(cluster_id):
diff --git a/planet/controllers/expression_profile.py b/planet/controllers/expression_profile.py
index 5c519e7..007a0ac 100644
--- a/planet/controllers/expression_profile.py
+++ b/planet/controllers/expression_profile.py
@@ -302,8 +302,7 @@ def export_expression_levels():
     """
     Will return a table with all (!) genes and their expression levels
 
-    :param species_id: internal ID of species to export
-    :return:
+    :return: either form with settings (on GET) or response with results (on POST)
     """
     form = ExportConditionForm(request.form)
     form.populate_form()
diff --git a/planet/templates/expression_heatmap.html b/planet/templates/expression_heatmap.html
index 8943426..480ebf9 100644
--- a/planet/templates/expression_heatmap.html
+++ b/planet/templates/expression_heatmap.html
@@ -23,7 +23,9 @@
         <li class="active"><strong>Results</strong></li>
     </ol>
     {% if cluster %}
-        <h1>Heatmap: <strong>{{ cluster.name }}</strong> <small>({{ cluster.method.method }})</small></h1>
+        <h1>Heatmap: <strong><a href="{{ url_for('expression_cluster.expression_cluster_view', cluster_id=cluster.id) }}"
+                                           class="qtip_tooltip"
+                                qtip_href="{{ url_for('expression_cluster.cluster_tooltip', cluster_id=cluster.id) }}">{{ cluster.name }}</a></strong> <small>({{ cluster.method.method }})</small></h1>
         {% import "macros/cluster_actions.html" as ca %}
         <div class="row">
             <div class="col-lg-6 col-sm-6 col-xs-12">
diff --git a/planet/templates/expression_profile_comparison.html b/planet/templates/expression_profile_comparison.html
index 6c8bbb9..ce1fb77 100644
--- a/planet/templates/expression_profile_comparison.html
+++ b/planet/templates/expression_profile_comparison.html
@@ -17,7 +17,9 @@
     </ol>
 
     {% if cluster %}
-        <h1>Profile comparison: <strong>{{ cluster.name }}</strong> <small>({{ cluster.method.method }})</small></h1>
+        <h1>Profile comparison: <strong><a href="{{ url_for('expression_cluster.expression_cluster_view', cluster_id=cluster.id) }}"
+                                           class="qtip_tooltip"
+                                           qtip_href="{{ url_for('expression_cluster.cluster_tooltip', cluster_id=cluster.id) }}">{{ cluster.name }}</a></strong> <small>({{ cluster.method.method }})</small></h1>
         {% import "macros/cluster_actions.html" as ca %}
         <div class="row">
             <div class="col-xs-6"><p><strong>View as: </strong>{{ ca.cluster_actions(cluster.id, exclude=["profile"]) }}</p></div>
diff --git a/planet/templates/find_enriched_clusters.html b/planet/templates/find_enriched_clusters.html
index 6a56bd3..f4b6162 100644
--- a/planet/templates/find_enriched_clusters.html
+++ b/planet/templates/find_enriched_clusters.html
@@ -43,7 +43,9 @@ <h1>Search results</h1>
                         {% if g.debug %}<td>{{ c.cluster_id }}</td>{% endif %}
                         <td><em>{{ c.cluster.method.network_method.species.name }}</em></td>
                         <td>{{ c.cluster.method.method }}</td>
-                        <td>{{ c.cluster.name }}</td>
+                        <td><a href="{{ url_for('expression_cluster.expression_cluster_view', cluster_id=c.cluster_id) }}"
+                               class="qtip_tooltip"
+                               qtip_href="{{ url_for('expression_cluster.cluster_tooltip', cluster_id=c.cluster_id) }}">{{ c.cluster.name }}</a></td>
                         <td>{{ c.enrichment|round(2) }}</td>
                         <td>{{ (c.cluster_count*100/c.cluster_size)|round(2) }}% <span class="text-muted">({{c.cluster_count}}/{{c.cluster_size}})</span> </td>
                         <td>{{ c.p_value|round(5) }}</td>
diff --git a/planet/templates/go.html b/planet/templates/go.html
index 0e2cae9..4fcd007 100644
--- a/planet/templates/go.html
+++ b/planet/templates/go.html
@@ -58,7 +58,9 @@ <h1>{{ go.label }}: <strong>{{ go.name }}</strong> <small>({{ go.readable_type }
                             {% for cluster in clusters %}
                                 {% if cluster.corrected_p_value <= 0.05 %}
                                 <tr>
-                                    <td>{{ cluster.cluster.name }}</td>
+                                    <td><a href="{{ url_for('expression_cluster.expression_cluster_view', cluster_id=cluster.cluster.id) }}"
+                                           class="qtip_tooltip"
+                                           qtip_href="{{ url_for('expression_cluster.cluster_tooltip', cluster_id=cluster.cluster.id) }}">{{ cluster.cluster.name }}</a></td>
                                     <td><em>{{ cluster.cluster.method.network_method.species.name }}</em></td>
                                     <td>{{ cluster.cluster_percentage|round(2) }} %</td>
                                     <td>{{ cluster.p_value|round(6) }}</td>
diff --git a/planet/templates/sequence.html b/planet/templates/sequence.html
index f85e6f1..0ad6e38 100644
--- a/planet/templates/sequence.html
+++ b/planet/templates/sequence.html
@@ -136,7 +136,9 @@ <h3 class="banner-blue" id="coexpression_networks">Co-expression Networks</h3>
                 {% for cluster in coexpression_clusters %}
                 <tr>
                     <td><abbr title="Click to show help" href="{{ url_for('help.help_topic', topic='cluster') }}" data-target="#helpModal">Cluster</abbr></td>
-                    <td>{{ cluster.method.method }}: <strong>{{ cluster.name }}</strong></td>
+                    <td>{{ cluster.method.method }}: <strong><a href="{{ url_for('expression_cluster.expression_cluster_view', cluster_id=cluster.id) }}"
+                                                                class="qtip_tooltip"
+                                                                qtip_href="{{ url_for('expression_cluster.cluster_tooltip', cluster_id=cluster.id) }}">{{ cluster.name }}</a></strong></td>
                     <td>{{ ca.cluster_actions(cluster.id) }}</td>
                 </tr>
                 {% endfor %}
diff --git a/planet/templates/tooltips/cluster.html b/planet/templates/tooltips/cluster.html
new file mode 100644
index 0000000..8fd3370
--- /dev/null
+++ b/planet/templates/tooltips/cluster.html
@@ -0,0 +1,11 @@
+<div>
+    <div><strong>Species: </strong><em>{{ cluster.method.network_method.species.name }}</em></div>
+    <div><strong>Method: </strong>{{ cluster.method.method }}</div>
+    <hr />
+    <div><strong>Enriched GO terms</strong> <span class="text-muted">(top 5)</span>:</div>
+    {% for go_enrichment in (cluster.go_enrichment|sort(attribute='enrichment', reverse = True))[:5] %}
+        {{ go_enrichment.go.name }} <span class="text-muted">({{ go_enrichment.go.short_type }})</span>{%- if not loop.last -%}, {%- endif -%}
+    {% else %}
+    <span class="text-muted">No enriched GO terms available for this cluster</span>
+    {% endfor %}
+</div>
\ No newline at end of file