They eat squid , octopus , fish , and crustaceans . Swordfish often kill their prey by swinging their sharp bill from side to side in a school of fish. They then eat the dead and wounded fish. Swordfish have very few predators. Orcas , sperm whales , some large sharks , and people eat swordfish.
Females are larger than males.
Females produce tens of millions of eggs and fertilization is external.