What are billfish?

In General Terms­- The term “Billfish” refers to various predatory fish species typically belonging to the taxonomical family Istiophoridae. Their biological characteristics include a spear-like rostrum or “bill,” which is used for slashing at and stunning prey. The dorsal fin of these species runs along a large part of their body and narrow pelvic fins. Billfish can be found spread throughout the worlds oceans and are defined as highly migratory species but typically reside in tropical or sub-tropical waters.  The prey of these apex predators differs from a variety of small fishes to crustaceans and cephalopods (i.e. squid)