scomber

— […] the familiar name by which all scombers are known at Montpelier being the peis d’avril, or April fish. […] All times and tongues have agreed to call the first of these scombers by some name allusive to the warlike weapon carried in his mouth—viz., a sword, several feet in length, finely attenuated in front, and, to the dismay of the denizens of the deep, of a temper like that of its owner, not to be trusted or trifled with. […] The size and strength of these fish are as remarkable as their pugnacity; the power, as in most scombers, residing in the muscles moving the tail.