Wednesday, February 7, 2018


We just learned about the Chambered Nautilus.

Another type of cephalopod is the Cuttlefish.

Cuttlefish have eight arms like an octopus, but they also have two tentacles that have sharp edges like teeth they use to hook onto their prey, or sting with venom.

They have very different eyes that are in a W shape, that lets them see in front and behind at the same time.
Cuttlefish have green and blue blood instead of red, and they have three hearts!

There is a bone in the middle of the cuttlefish's body called the cuttlebone that is made of aragonite.
This is like a hollow crystaline type of bone that they use to push air or liquid into, so they can float or sink.
Just like some other cephalopods, cuttlefish have ink they can squirt out when they are scared.
This ink was so dark that it was used for painting or in food, and the science name of Cuttle fish is "Sepiida" which is where we get the color name "sepia" from.

Cuttlefish are also sometimes called chameleons of the sea, because they can change their color to look darker, lighter or even change color to disguise themselves.

(from: wikipedia - cuttlefish)

(from: wikipedia - cuttlefish)

(from: wikipedia - cuttlefish)

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