It is partly a Melanochromis. It appears to be a hybrid.
The second fish is a Labidochromis caeruleus. The only way to be sure of sex is to vent the fish.
Here's an article on how to do it.
http://www.fishhead.com/articles/ventsex.htm
The second fish is a Labidochromis caeruleus. The only way to be sure of sex is to vent the fish.
Here's an article on how to do it.
http://www.fishhead.com/articles/ventsex.htm