It's a Zebra Danio glofish. My parameters are 0 Ammonia, 0 Nitrite, 10-20 Nitrate. Temp is 78. I test weekly on Sundays.
How it looks below is actually smaller than I found it on Sunday. We were gone for 2 nights and I fed them before we left. It still wants to eat. I don't honestly believe it's constipated. It really appears to be extra fluid.
No pine-coning. I do not overfeed. I give flakes or pellets to my tetras/danios, and then I have food for the cories and shrimp that falls to the bottom. These little pigs do go down to the bottom to eat that sometimes. All the food is eaten within 15 minutes when I feed them, except the shrimp food.