I need help with a part of my essay I cant find out if they were transported here on purpose on not all I can find related to that is how they got here. If you decide to help please tell me the site you found them on please.
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That's pretty easy information to find. Here's a quote from Wikipedia- "The species was originally native to the lakes of southern Russia and Ukraine, but has been accidentally introduced to numerous other areas and has become an invasive species in many countries worldwide"
Anonymous
No- ballast water is just taken up and dumped when no longer needed. Now it's changed out mid ocean so most foreign wildlife is flushed out.