In wildlife management contexts, which species is identified as an invasive marine organism?

• A. Dungeness crab
• B. Bluefin tuna
• C. Lionfish
• D. Manatee

Answer: (C)

Invasive species are organisms introduced to a new area where they spread and cause harm to native ecosystems, economy, or human health. The lionfish fits this role in marine systems because it was introduced to the western Atlantic, Caribbean, and Gulf of Mexico (likely via the aquarium trade) and has since formed dense populations. It preys on a broad range of small reef fish, reproduces rapidly, and has few natural predators in the invaded region. This combination allows it to outcompete and significantly reduce native reef fish populations, leading to altered reef communities and ecosystem function. Because of these impacts, lionfish is a major focus of wildlife management efforts, including removal campaigns and public education.

Dungeness crab and bluefin tuna are native to their respective regions and not considered invasive in those ecosystems, and manatees are native and protected rather than invasive.