Also posted Oct 8 on Pharyngula
Claimed "We will never find
Nobody told, though, the
That's what he did.
The nautilus swims back-to front
Which is quite an unusual stunt
But his shell--which is odd
For a cephalopod--
When he bumps into things, bears the brunt!
Cuttlefish Physiology Limerick
Look again, and you might doubt your eyes:
It's the cuttlefish, cloaked in disguise!
As it changes, within
Its remarkable skin
Are chromatophores, changing in size.