| Giant cory, Banded cory, Bearded catfish Scleromystax barbatus |  |
| Giant fresh water puffer Tetraodon mbu |  |
| Giraffe Cichlid, Giraffe Haplochromis Nimbochromis venustus |  |
| Glowlight tetra Hemigrammus erythrozonus |  |
| Gold shell-dwelling cichlid Lamprologus ocellatus |  |
| Gold striped cory, Bronze corycat Corydoras aeneus |  |
| Gold tetra, Brass tetra, Armstrongs tetra Hemigrammus armstrongi |  |
| Golden Arowana Scleropages formosus |  |
| Golden Julie Julidochromis ornatus | |
| Golden algae eater Gyrinocheilus aymonieri |  |
| Golden dwarf acara Nannacara anomala |  |
| Golden wonder panchax Aplocheilus lineatus | |
| Green scat, Red tiger scat, Spotted scat Scatophagus argus |  |
| Guppy, Millions fish Poecilia reticulata | .jpg) |
| Gasteropelecus sternicla Silver hatchet fish | |
| Geophagus Steindachneri Red Humped Eartheater |  |
| Girardinus metallicus Metallic livebearer |  |
| Glossolepis incisus Salmon-red rainbowfish |  |
| Gyrinocheilus aymonieri Golden algae eater | |
A biotope aquarium is one that attempts to replicate the natural habitat of a particular species. These aquariums are often more staisfying for the owner, but will also keep the fish happier, allowing them to exhibit their natural behaviour and hopefully reproduce. See more about different biotopes here