What are emperor shrimp?

"Emperor shrimp" is not a scientifically recognized term. It's possible you're thinking of one of these shrimp species:

* Caridina multidentata: This shrimp is often called a "Red Emperor Shrimp" and is a popular choice for aquariums due to its striking red coloration.

* Caridina cf. babaulti: This shrimp is sometimes referred to as a "Blue Emperor Shrimp" due to its vibrant blue body.

Both of these species are small, freshwater shrimp belonging to the genus *Caridina*. They are known for their beautiful colors and relatively peaceful temperament, making them a popular addition to planted aquariums.

If you can provide more details about the "emperor shrimp" you're interested in, I can give you more specific information! For example, what color is it? What kind of environment does it live in? This will help me narrow down which species you're referring to.