I don't know why everybody thinks they are a fusco. I know now that it isn't a macrostoma but a nigriventer. Tyrannochromis come from all over the lake and depnding on location is what their color is. Not all the tyrannochomis ard just all blue. Some of the macrostomas have yellow on the bottom half of th body and some are all blue. Some nigriventors are all blue but some have orange on the side like mine does and those are called tyrannochromis sp. orange spot. Fusco's do look very simimlar in a lot of ways but what are in my pictures is a tyrannochromis. I was going to post pictures but my camera isn't working at the moment. Here are some pictures of the type of tyrannochromis I have and you can even see the orange on the side, it just isn't as bright as the one I have.
http://www.malawimayhem.com/profile_show.php?id=528
Here are some pictures of a fusco
http://www.malawimayhem.com/profile_show.php?id=369
You can see body shape is similar color wise can be close as well depending on fish but fuscos have more of a red than orange. If you look at the two links mine most definatly a tyrannochromis and not a fusco.