Going with the crowd can be risky for juveniles, especially when it involves a FAD. It can lead to death by capture in a purse seine net, or perhaps to an ecological trap that can harm the group.
Fish Aggregating Devices (FADs) are floating objects that attract large and small tuna. Fishermen rely on this poorly-understood aggregating behavior of tuna and use FADs to exploit populations that might otherwise be hard to catch.
The result is enhanced fishing succes, and perhaps even worse is the apparent risk of enticing tuna to move away from ecologically favorable areas to places where it's harder to survive and thrive.
Your mama always told you to stay away from FADs, and now we know she was right...if you're a young tuna.