Final answer:
The passage develops the ideas that lionfish are adaptable to various habitats and that there are ongoing efforts to document their populations, indicative of the challenges posed by this invasive species.
Step-by-step explanation:
In the context of invasive species and particularly the lionfish invasion, two central ideas are developed in the passage. The first is that lionfish can be found in a variety of habitats, which indicates their adaptability and potential to spread across different environments. The second is that efforts are made to document lionfish populations, highlighting the scientific and ecological efforts to monitor and understand the spread of this invasive species. Both of these ideas are essential to grasp the scope of the ecological issue posed by lionfish and the measures taken to address it.
While the texts do not explicitly state that citizens are better at documenting lionfish than researchers, citizen science can contribute significantly to data collection. Similarly, although it is not specifically mentioned, the potential for scientists to think lionfish may invade more areas in the future underlines the ongoing concern about the ecological impact of their spread.