There are two species of smaller cory (actually, there are more than that, but there are two that are easy to find): C. Hasborus (Dwarf Cory) and C. pygmaeus (Pygmy Cory). They are both toxically cute. I have a dozen pygmies in a 20 high with 8 neons, some ottos, and a small bulldog pleco. They love to hang out on plant leaves. Couple of things about the little ones: they are still mostly bottom dwellers, but they get into the midwater a lot more than the bigger cories. Also, they prefer to be in large groups. Regular cories you should have at least 4 to get true cory behavior, the smaller ones at least 6. When I was reading up on pygmies, I found that they would school in the hundreds.
The plus side of this is that, for the space 3 full sized cories take up, you can house 9 pygmies - they top out at an inch.
forum community dedicated to tropical fish owners and enthusiasts. Come join the discussion about species,breeding, health, behavior, aquariums, adopting, care, classifieds, and more! Open to fish, plants and reptiles living in freshwater or saltwater environments.