Exactement, Cassidain. The bit about no fear of humans is correct -- they trail after us a few meters away looking vaguely demandingly at us -- just like our dog looks at us at dinner time (= our own dinner time, but he demands his tribute!).
The biggest barracuda we've seen was whilst dangling our legs off on a pier in Corossol at dusk. We watched a woman with her dog dinghy towards the pier from her sailboat to buy provisions, then about 20 minutes later load water and her dog and start motoring her tiny boat back out. And next, crossing perpendicular across her wake was an enormous solitary barracuda - thick and dark like an old telephone pole and at least 3 meters long -- it looked twice the length of her dinghy. It swam near the surface, straight, very slowly and deliberately like any animal with no fear and a single objective. Luckily its objective was not the dog nor the dinghy (nor our dangling feet) but something away towards Maya's. And next, crossing maximum 20 meters behind the fish was an older man in just a speedo and swimming cap (!!), breaststroking across the same piece of water. We watched hoping to not see anything happen. Please God no, at least not while we're sober! Chilling but nothing happened. And probably such near-misses occur all the time without incident.