How many tetras are there?

The term "tetras" refers to a family of small Freshwater Fish known as Characidae, which includes various species commonly kept in aquariums. There are over 150 recognized species of tetras, with popular examples including the Neon Tetra, Cardinal Tetra, and Rummy Nose Tetra. Each species varies in size, color, and habitat preferences. The exact number may fluctuate as new species are discovered and classified.