Cuttlefish (Sweet Square #8)

© 2012 Sylvia Liu

Cuttlefish are less well known than other cephalopods, but just as interesting:

• Their blood is greenish-blue because it uses a copper-containing protein, hemocyanin, to carry oxygen instead of the red iron-containing protein hemoglobin we're familiar with.

• They are masters of disguise because they can rapidly change skin colors to camouflage themselves.

If you liked this post, you may also enjoy:

• Nautilus (Sweet Square #1)
• Kraken (Sweet Square #3)
• Steampunk Squid (Sweet Square #4)