In this page:
http://commons.wikimedia.org/wiki/Commons:Featured_pictures/Animals/Fish?wi…
there is an image called *Dactylopterus
volitans<http://commons.wikimedia.org/wiki/Dactylopterus_volitans>
* (Flying gurnard)
It sort of "doubles" if you put the cursor on it. All other images on the
other hand just show their caption.
Aubrey