Undoubtedly sea-serpents have some enemies of which we are and probably
will remain ignorant. But spermwhales and men are certainly their
most terrible foes, the former on account of their enormous beak with
formidable teeth (144), the latter on account of their nets (14),
boathooks (112), harpoons (59, 121), and rifles (9, 19, 41, 69, 90,
110, 115, 129, 130).