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Green sea urchins

Three taxidermied green sea urchins on a plain gray surface. Front: two whole sea urchins (different sizes, brown/green spines). Back: a third smaller sea urchin in a clear glass jar with a black lid. Beige label on the jar: "Echinoderm Collection," "sea urchin," "OZ 74," name of a biological laboratory in Cooksville, Ontario, Canada.

Collection Musée québécois de l’agriculture et de l’alimentation. Photo : Claudia Larin.

Three green sea urchins. The largest one, on the left, has a diameter of 8 cm, while the one on the right has a diameter of 5.50 cm. The one in the jar is even smaller.

The latter urchin comes from Boreal Biological Laboratories Ltd. Located in Cooksville, Ontario, This laboratory, founded in 1964, specialized in precision instruments and organic farming. The company played an important role in science and education in Canada.