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This corydoras was listed as corydoras sp. at a fish store. I was hoping I could get help figuring out the species before I purchase the fish.

looks like a young

That is definitely Corydoras Similis just like Christiansen said.

Thanks for the help, I contacted the seller and told them. They said the issue they had with it being similis was to do with its color. I for one agree that it is a similis after all though.

AvengedKombat wrote:They said the issue they had with it being similis was to do with its color.

It will colour differently if kept over light sand rather than black substrate.

Jools