Marine biologist and blogger WhySharksMatter presents the latest in his award-winning series of "ethical debates", where he takes a hot topic from the environmental movement, presents both sides, and asks readers to argue it out. Since his readership includes scientists and environmental leaders from all over the world, as well as students and members of the general public, these conversations are always interesting. Your participation is always welcome.

Marine biologists in California have made a fascinating discovery- the beginnings of a new species of fish. If left alone, these recently-isolated populations of grunion will evolve into two separate species.

The question is simple- should we treat the potential new species of grunion as an endangered species worthy of protection, or as an invader to an existing ecosystem that should be exterminated?

Read about this incredible discovery and join in the discussion!

"While the two populations aren’t yet distinct enough to be considered different species, it’s easy to tell them apart... a new species might be evolving before our very eyes! The question is… what should we do about it?

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