Larger groups help make the fish feel more confident. They behave differently and will spend less time hiding when there are other Serpae Tetras around.
Typically, they stick to the middle and bottom of the aquarium. They’ll occasionally swim to the surface (usually during feeding time).
These fish do exhibit some unique swimming patterns. Rather than swimming elegantly throughout the habitat, they will swim in a jerky rhythm. They’ll swim in short bursts before resting and starting again.