Fish tend to be attracted by drifting vessels. You might not have a hook, but you can likely improvise fishing gear. Make spears, hooks and grapples from wood splits, boat seats and other items that you have onboard. You can make line by unraveling canvas. Don’t drink the fish’s blood unless you have plenty of water, because blood is salty. Both spinal fluid and fish eyes have a lot of water in them, which is good news if you’re out of drinking water.