Contrary to its name, the Cuttlefish is a mollusk of the class Cephalopoda (just like the Squid and Octopus). The Cuttlefish is fairly widespread and can be easily spotted in Europe and Asia. The Cuttlefish has only one "bone", the cuttlebone, which works as an internal shell. They range from 15 to 25cm (5.9 to 9.8in)
The Cuttlefish is fairly remarkable by its ability to change its skin color in seconds, just like a chameleon. He can do so either as a camouflage or as a means to communicate with fellow cuttlefish. Their skin is made of groups of red, yellow, brown, and black pigmented chromatophores above a layer of reflective iridophores and leucophores at a resolution of 359 DPI - which happen to be about the iPhone 4's retina display resolution... pretty high! Fun fact, their eye is one of the most developed in the entire animal kingdom with the ability to even perceive light polarization. Its blood is green-blue as it does not used hemoglobin to carry oxygen but a copper-based protein called hemocyanin.
They usually swim peacefully near the rocks in search for some crabs and fish to eat, mostly at shallow water, but they can swim into deep sea to depth of about 600 meters (2.000ft). It's an amazing encounter to see this fairly big fish laying there quietly and they are usually kind enough to take the pose and wait patiently until you get your picture right !
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Ksso -
CMAS 3* VDST / N4
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Dived in: French Polynesia, Honduras, Jamaica, Netherlands Antilles, United States, Mexico, Portugal, Spain, Dominican Republic, Egypt, Thailand, Greece, Cyprus, France, Indonesia
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