The correct name would be Krobia itanyi.
The fish in the bag look like Herotilapia multispinosa.
In K. itanyi the black lateral line goes from behind the eye to the base of the end of the dorsal fin.
In H. multispinosa the black lateral line goes from behind the eye to the base of the caudal (end of the caudal peduncle).
Neither are closely related but they are of similar size. K. itanyi is a South American cichlid from the Acara family and H. multispinosa is a medium sized Central American cichlid and they're very nice fish themselves.