Last July, [Louis] bought a kayak off of Craigslist. It was a pedal-powered device with a hand-operated rudder, and he ended up enjoying his time on the water. [Louis] fishes, though, and it was a bit ...

A man set out for what he thought was going to be a regular day of kayaking — but was met with a giant gaggle of jellyfish instead. Chris Denehy is a sea kayak tour guide and runs his own company, ...