With this tank size the hobbyist has to do his or her homework in advance. The main point is to know how big your fish will get when adult. I have seen red tail sharks sold at 10 cm to people owning an 80 cm tank. Such a fish should not be considered for any tank shorter than 2 meters and less than 600 liters. A second point is the specific needs or peculiarities of the fish you intend to keep.
Larger fish require even more space.
Since the males usually have brighter colors they are usually preferred by hobbyists but this may lead to problems which are far more serious in small tanks. The hobbyist should always keep in mind that males can live in peace till spawning time but when that time eventually comes, tank size is a critical parameter for the survival of the submissive male. These are some of the points the new hobbyist should take into account before selecting fish or tank. Whichever selection is made first largely limits the options for the second. Keeping an adult Melanochromis chipokae in such a tank means that this is the only fish you will have in there.