Given the worth of each tuna, it's only logical to invest in an electronic documentation system today that could help keep these awe-inspiring fish around for fishermen, conservationists, seafood lovers and scientists for generations to come.

Held on the sea's surface or just below with floating devices, driftnets can be miles long. Depending on the size of the mesh, they can entangle anything that happens to swim nearby, including sea turtles, whales, swordfish, and tuna.

How heavy is 35,000 metric tons? For starters, it's the weight of 193 jumbo jets or 2,917 African elephants. It's also the amount of Atlantic bluefin tuna that have exceeded the official catch quota in the Mediterranean Sea in the past two years alone.