there are lots of less aggro fish that will live in a 100g... but if you ask me, as far as new world cichlids go, JD's are far from the most agressive. What I recommend though would be Severums, whichever color you like. I prefer NICE golds (none of those flesh-colored ones) or red-shoulders. They have a great personality and will reach about 10" or more. Heres my nice gold
