Great Barracuda

Photo: Christian Amador Da Silva · © all rights reserved

Barracuda at Garajau form loose aggregations of 20 to 80 individuals that patrol the mid-water column between 10 and 25 metres, their mirrored flanks catching sunlight in coordinated spirals as they herd sardines and small wrasse against the reef wall. As apex ambush predators, they exert top-down control on the resident bait-fish populations that in turn keep plankton-feeding invertebrate communities in balance. Their year-round residence at Garajau is a direct consequence of the reserve's protection — commercial fishing pressure outside the boundary has substantially reduced barracuda numbers across the rest of Madeira's coastline.