What are the explanations for the large increase in the number of lionfish?

The large increase in lionfish populations can be attributed to several factors, including their introduction to non-native ecosystems, particularly in the Caribbean, through the aquarium trade. Their lack of natural predators in these new environments allows them to thrive and reproduce rapidly. Additionally, lionfish are highly adaptable feeders, preying on a wide variety of reef fish, which further exacerbates their population growth and impacts local marine biodiversity.