Acquired: Fish / pet store
Posted May 01, 2015
The giant Danio in the photo was dubbed "Pork Chop" because he was put into a new tank starting it's cycling and was, well, potentially a sacrificial lamb to the start up process. Danios seem to be very hearty fish though. He had no issues with the various spikes as the tank became established and doesn't seem overly picky about conditions now (not that I push it and let it get too dirty or the pH out of whack).
They are school fish so Pork Chop has five Danio tankmates. He's currently about 3" long. They can get to 4". They tend to stay towards the top or middle of the tank. They aren't very "social" like my goldfish or blood parrots, who come to the side of the tank when I'm nearby. They are very fast swimmers and seem to like hanging on the side of the tank where the output from the canister filter creates a little current. I keep the tank at 75 degrees to suit their tank mates and that seems fine for them.
They're a generally easy fish to care for so very novice-friendly.