diff --git a/binaries/data/mods/public/simulation/templates/template_unit_fauna_fish.xml b/binaries/data/mods/public/simulation/templates/template_unit_fauna_fish.xml
index ccfe03cae9..61f4b75d01 100644
--- a/binaries/data/mods/public/simulation/templates/template_unit_fauna_fish.xml
+++ b/binaries/data/mods/public/simulation/templates/template_unit_fauna_fish.xml
@@ -7,7 +7,7 @@
   <Health disable=""/>
   <Identity>
     <GenericName>Fish</GenericName>
-  </Identity>
+ <Classes datatype="tokens">IsSeaCreature</Classes> </Identity>
   <Obstruction>
     <Unit radius="0.1"/>
     <BlockMovement>false</BlockMovement>