Invasive lionfish had no measurable effect on prey fish community structure across the Belizean Barrier Reef

A four-year longitudinal study along the Belize Barrier Reef found no measurable effect of invasive lionfish on the density, richness, or composition of native prey fish communities. Despite the assumption that lionfish significantly impact Caribbean reef ecosystems, this research—using a modified before-after control-impact (BACI) design across 16 reefs—detected no substantial changes in prey fish populations following lionfish invasion. The study suggests that either higher lionfish densities or other ecological factors (such as reef complexity and predation) may overshadow any potential effects of lionfish on prey populations at this large spatial scale.

Hackerott, S., Valdivia, A., Cox, C. E., Silbiger, N. J., & Bruno, J. F. (2017). Invasive lionfish had no measurable effect on prey fish community structure across the Belizean Barrier Reef. PeerJ, 5, e3270. Portico. https://doi.org/10.7717/peerj.3270