Cuttlebones dissected from dead S. officinalis cultured in captivity. Note the dark bands visible in the layers of the cuttlebone. See image 1184 for a close-up of this. The dark bands are thought to coincide with periods of intense inking in the culture systems resulting in the water being black. Apparently this ink in the water is incorporated into the cuttlebone as each daily new layer is added. The cuttlebones are arranged with the anterior (head) end at the top of the image.
Lab or Wild: Lab; Origin: E. atlantic, u.k. or france