Here's the definition from FishBase:
young-of-the-year (english) Age-0 fish, or those animals born within the past year, from transformation to juvenile until January 1 in the Northern Hemisphere or July 1 in the Southern Hemisphere, which have not yet reached one year of age. Abbreviated as YOY.
Make it 3 spotted gars, i saved the last one from starvation at the LPS, he's soooo slim you could mistake him for a pike. Funny thing is, its from the same batch i got my first two gars from. All of them were skinny and same in length, yet now my 2 gars and almost an inch longer. Must mean I'm feeding them well .