Conversation so far:
what is the fastest sea animal on earth
A hooked black marlin has been recorded stripping line off a fishing reel at 120 feet per second (82 mph; 132 km/h).
where is the black marlin found
The black marlin (Istiompax indica) is a species of marlin found in tropical and subtropical areas of the Indian and Pacific Oceans.
how big can the black marlin grow
With a maximum published length of 4.65 m (15.3 ft) and weight of 750 kg (1,650 lb), the Black marlin is one of the largest marlins.
how do black marlins connect to humans
Black marlin are fished commercially and are also a highly prized game fish.

Question: what does the fish eat
Self-contained rewrite: what do black marlins eat