 Prepared foods such as flakes, freeze dried "Tubifex" worms and similar fare are also devoured avidly.The lifespan of the lemon tetra in the aquarium can be as much as 8 years, though 6 years is a more typical figure.Lemon tetras exhibit an interesting behaviour pattern in the aquarium, replicated by several other characin species, in which males will adopt 'landmarks' within the aquarium and use these as places from which to display as maturity approaches.