Sharks announcing their own Capture

Abstract

LIEUT. C. H. TAYLOR, of H.M.S. Cossack, in his Remark-book for 1869-70, alludes to the following ingenious mode of making sharks announce their own capture, It appears that the island of Johanna, at the north end of the Mozambique Channel, is frequently visited by numerous sharks, whose flesh is esteemed as an article of food by the natives, who also prize the skin and oil for domestic or commercial purposes.