Harlequin ShrimpHymenocera picta. The Harlequin Shrimp is a standout addition to any aquarium due to its unique look. It sports a white body with bold light blue spots. In terms of size, the males are usually smaller than the females. While they do well in pairs, keeping a single shrimp works fine too. Harlequin Shrimp prefer to conceal themselves within rock structures during the day, so it's important to provide ample hiding spots with rocks in their tank. Their