Swordfish
Threats and parasites
Human fishery is a major predator of swordfishes. The annual reported catch in 2019 of the North Atlantic swordfish amounted to a total of 1.3 million kilograms (2.9 million pounds).
Breeding
Large females can carry more eggs than small females, and between 1 million and 29 million eggs have been recorded. The pelagic eggs measure 1.6–1.8 mm (1⁄16–5⁄64 in) in diameter and 2+1⁄2 days after fertilization, the embryonic development occurs. The surface-living and unique-looking larvae are 4 mm (5⁄32 in) long at hatching. The bill is evident when the larvae reach 1 cm (3⁄8 in) in length.
Fisheries
Swordfish are vigorous, powerful fighters. Although no unprovoked attacks on humans have been reported, swordfish can be very dangerous when harpooned. They have run their swords through the planking of small boats when hurt. In 2015, a Hawaiian fisherman was killed by a swordfish after attempting to spear the animal.
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