Ken Baldwin is a Writer/Editor for Fishing On SI, where he writes stories about fly fishing and the lifestyle that surrounds it. His writing and photography have appeared in Men's Journal, Catch ...

In theory, fly-fishing is a simple sport: Pick a body of water, choose a fly-fishing rod, select your “fly” (or bait), tie a secure knot, cast your line and, hopefully, land a fish on the other end.

The Pacific bluefin tuna is one of the most elusive fish found in waters off the California coast. These pelagic (open water) migrants are known for providing one of the hardest, most grueling fights ...