  Expert systems prove to be suitable replacement for human experts when human
experts are unavailable for different reasons. Various expert system has been
developed for wide range of application. Although some expert systems in the
field of fishery and aquaculture has been developed but a system that aids user
in process of selecting a new addition to their aquarium tank never been
designed. This paper proposed an expert system that suggests new addition to an
aquarium tank based on current environmental condition of aquarium and
currently existing fishes in aquarium. The system suggest the best fit for
aquarium condition and most compatible to other fishes in aquarium.
