You will receive Santa pattern Crystal Black Shrimp, also known as Super CBS. The super CBS you will receive will be sub adults, having a size around a half of an inch (.5 inches).
Super Crystal Black shrimp are specifically bred to be mostly black with a white head. These shrimp are line bred by to produce their unique patterns. This line breeds very true.
Crystal black shrimp are stunning in color and pattern. Most hobbyists refer to crystal black shrimp as CBS. The CBS is an entry level freshwater shrimp for the Caridina genus. When a hobbyist is making the transition from Neocaridina to Caridina, the crystal black shrimp is a great option to start with. While crystal blacks require a lower PH, they can still live in condition that are slightly alkaline (PH above 7).
The grading scale for crystal shrimp is somewhat difficult to comprehend at first. Here are the grades in order of highest to lowest: SSS, SS, S, A, B and C. The higher the grade (SSS), the less red or black the shrimp will have. So, a C grade shrimp will be almost all red or black while an SSS grade shrimp will be almost completely white. The other way to grade the shrimp is by color and how solid the color is versus being transparent in color. Shrimp with poor color are usually culled (separated) from the colony.
Here are the tank conditions we keep our CRS at: