I was looking at my black worm tank at a glance and something caught my eye. Something small and swam fairly fast. I thought I was imagining things, so I inspected further and found it. At first I thought it was some insect or something, but after further inspection, it seems like a fish fry... It resembles corydoras fish VERY greatly; both in the way it swims and in its body anatomy.
But I thought it's pretty slender for a cory. For now, I put it in small chinese container and gave some MW in case its actually cory. And float it in my cory tank.
Before I put black worm in this tank, I did put 3 corydoras pygmaeus for about a week or so while waiting for the bigger one to house them. When they moved, I cleaned the tank and put in black worms. Also, the pattern doesn't seem like corydoras pygmaeus' pattern, so.. uh.. what is this thing? :confused: