Invasive marine species pose a threat to native species and ecosystems, usually through outcompeting, predation or disease spread. Alien species are deemed to be invasive if has the ability to spread causing damage to the environment, the economy, or health. Such species often thrive due to a lack of normal predation.
Predation on small reef fish. Rapid reproduction. Few local predators. Pelagic juveniles travel long distances and rapidly recolonise.
Sand/ mud flats
Possibly outcompete and displace native species e.g. Turtle Grass Thalassia testudinum