What type of goby is this

[fishboy123]

I saw this goby in a pet store and it was in an African cichlid tank. I asked a shop employee wether they are alright with african cichlids an he said they will be fine so I got two and added them to my cichlid tank. All is well and they get along fine with the cichlids. At the shop it doesn't say what type if goby they are it just says goby. Can anyone help me out with identifying them??

 

[coralbandit]

Looks like a type of sleeper goby?
Monster fish!
Gobies for the Freshwater and Brackish Tank

 

[Toad]

Maybe purple spotted gudgeon?

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[trustemedia]

I'm with the above. Purple Spotted Gudgeon.

 

[fishboy123]

Will these two be ok in a 4ft by 2ft African cichlid tank?