The Blue Freshwater Dwarf Crayfish (Cambarus diminutus) is a small, vibrant crustacean known for its striking blue color. Typically growing to about 2 to 3 inches (5 to 7 cm), it has a compact body with bright blue hues, making it a popular addition to aquariums. These crayfish are peaceful but can be territorial, especially when establishing burrows or during molting. They are scavengers, feeding on algae, detritus, and leftover food, helping to keep tanks clean. Blue Dwarf Crayfish prefer a well-planted tank with hiding spots and slightly acidic to neutral water. They thrive in warm temperatures and are easy to care for, but they should be kept with non-aggressive tankmates.