Polyhedral forms in fishes!

How funny is this: Scientists have looked at exotic fishes a bit more exactly, and guess which structures they found then. Polyeders, of course. What else!

Scrawled cowfish

Humpback turretfish

Irreagular pentagons can be found in the scrawled cowfish and humpback turretfish.
Read the full article here: http://precedings.nature.com/documents/2191/version/1/files/npre20082191-1.pdf