The Book of Household Management by Mrs. Beeton

204. THE POSITIONS OF THE TEETH OF FISHES are well calculated to excite

our amazement; for, in some cases, these are situated in the jaws, sometimes on the tongue or palate, and sometimes even in the throat. They are in general sharp-pointed and immovable; but in the carp they are obtuse, and in the pike so easily moved as to seem to have no deeper hold than such as the mere skin can afford. In the herring, the tongue is set with teeth, to enable it the better, it is supposed, to retain its food.