Despite the majority of organisms living peacefully on Earth with their natural environment, there are plenty of creatures that are more than a little invasive. An invasive species, for those who may not know, is a type of plant or animal that is not native to any specific area of the world, but tends to move in and cause damage to the environment shortly after arrival. Invasive creatures are known to cause extinction level events for many organisms, though they may not always appear dangerous. Here are ten of the most invasive creatures known to mankind.
American Comb Jelly
The American Comb Jelly is found in temperate, subtropical oceanic environments along the Atlantic Coast of North and South America. They were accidentally introduced to the Black Sea, where they devastated the ecosystem.
The Nile Perch
The Nile Perch is a massive freshwater fish known to grow up to 200 kilograms and reach two meters in length. They were introduced to Lake Victoria in 1954, and have now been the cause of over two hundred fish species going extinct.