Can you help me figure out what type of fish this is?

[deezle99]

I'm posting from my phone so it won't let me attach a picture, but I just bought it off Kijiji and the ad is still up: http://hamilton.kijiji.ca/c-pets-other-South-American-cichlid-2-axolotls-for-sale-W0QQAdIdZ453168700
The last picture looks more like it than the second. It's about 6 inches long and I have no clue what it is. Any help is appreciated!!

 

[fwprawn]

Nicaraguense

 

[aclockworkorange]

Hypsophrys nicaraguensis


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[deezle99]

Yes thank you!!