When was Estuarine Round-herring created?

The term "Estuarine Round-herring" refers to a species of fish, "Etrumeus teres". There's no specific date for its "creation" as it's a naturally occurring species that has evolved over millions of years.

It's important to understand that species don't have specific "creation dates." They evolve gradually over time, adapting to their environment. Therefore, it's impossible to pinpoint a specific date for the "creation" of any species, including the Estuarine Round-herring.