Who is blue marlins natural enemy?

If a Betta's gills are black does that mean it's sick? Do grey nurse sharks eat or attack humans? What is the Hawaiian translation for fish on? What type of mark or tag would be best for rapidly marking large numbers of small juvenile largemouth bass? How much does a bass recorder cost? Can you get sunburnt when it is cloudy? What do black tigers eat? Does a bat eat fish? What sharks begin with the letter a? Are clownfish endothermic or exothermic? Are the cans of wild caught sardines coated with BPA? Do humans eat shark meat? Who is Jack Black's character in Shark Tale? How do you apply diuron 80df to a pond? How do I clean an IAC motor on a 1994 E-150? How does a piranha adapt to its environment? What level consumers are eels? Do pond skaters eat algae? Relationship between eel and a coral? How long can a salmon faverolles chicken live?

Who is blue marlins natural enemy?