5 Red Rili Shrimp - Neocaridina davidi Live Freshwater Aquarium Shrimp - 1/2 to 1 inch long by SoShrimp 5 Red Rili Shrimp for your freshwater aquarium. Shrimp size: 1/2 to 1 inch, young adults ready to breed. Distinctive rili pattern, clear center, red on the head and tail. Free moss will be included for the shrimps to hold on to during the ride. Live Arrival Guaranteed!