Lemon Tetra - Hyphessobrycon pulchripinnis This is one very hardy fish and great for beginners. They do great in planted tanks. Size is roughly 3/4" - 1". - [ ] Lemon Tetra: gorgeous Tetra with a lemon shine and red eyes. Their fins have a black boarder with a bright yellow touch. Introduced into the hobby in the early 1930’s the Lemon Tetra has been a long time favorite. Maxing out at 5cm they are a great addition to any tetra tank with colors that will pop in a planted tank.