Titan is the brightest one, at bottom left. Rhea is the second in brightess, at the extreme right of the picture.
The last 4 moons, closely to Saturn, from left to right are Mimas, Thetys, Enceladus and Dione.
The moons of Saturn are numerous and diverse, ranging from tiny moonlets less than 1 kilometre across, to the enormous Titan, which is larger than the planet Mercury. Saturn has 62 moons with confirmed orbits.