Hard to tell, but it could be a maxi-mini. I bought one locally that was being sold as a "pink and green carpet.". They really prefer rocks, whereas the bigger ones like sand. That's not a foolproof way to ID, but if the nem is sticking to rocks and displaying that many colors... My 2 cents says maxi-mini. They get 6" or so, and mine hasn't moved at all since it settled in.