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Show Inkfish That Blinds Enemies With Light I A cuttlefish that confounds its enemies ene-mies with light Instead of darkness is tlie interesting creature described by Prof. E. Newton Harvey, student of what is popularly known as "cold light," who devoted eight months to research in the marine laboratories of Naples and Messina, Italy. Ordinary squid or inkfish that live neat the surface escape their pursuers hy throwing out a cloud of black fluid, as a kind of submarine smoke screen. Professor Harvey explained. This abysmal form, which lives at depths of probably ten thousand feet, where no light ever penetrates, has only a rudimentary ink sac, which Instead In-stead of the usual Inky sepia contains a luminous substance. When disturbed dis-turbed it discharges a Jet of this lu minous material and thus blinds Us enemy with light instead of darkness. Professor Harvey is of the opinion that this deep-sea squid is a descendant descend-ant of surface-living animals, but that as it evolved in darkness it found that I this reversal of its ancestral mode of defense was useful in insuring its survival. sur-vival. . |