This could be good fry tank or breeding application. Will include the pictured filter and small air pump. There is not much room for jumping fish to escape from hinged lid lifts both sides. Don't laugh but yes this did once hold bread at Cub and it does indeed hold water. I used it many a month and it holds water. Not more than a couple gallons is the size. Hope someone can use if for something fun I did have small fry in it once.