Strawberry rasboras are quite tiny and they school very tightly. I've got about fifteen of them in a ten, they are charming, mid level swimmers and only now and then do I see one by itself. Usually they are all together, all the time. Very cute, peaceful and it's not too hard to tell the sexes apart either. They have a black spot on their sides, and in males it is distinctly larger than in females, along with the usual physical differences, like fuller and rounder belly on females. So unlike many fish, you can sex them with reasonable ease even though they are very small. Less than one inch full grown. Not quite as brightly coloured as Chili rasbora, but very pretty.