5 Live Thai Micro Spider Crabs (Limnopilos naiyanetri) - 1/4 to 1/2 inch in diameter - Fully Aquatic! by Aquatic Arts IMPORTANT - THESE CRABS ARE EXTREMELY SMALL - FOR EXPERIENCED NANO AQUARISTS AND SHRIMP HOBBYISTS ONLY! These are fully aquatic crabs, meaning they can always stay immersed in water and can therefore be kept in an aquarium! Thai Micro Crabs resemble spiders in appearance because of their unusually long legs. They are usually a silvery color with light brown or beige legs. Thai Micro Crabs are very rare in the aquarium hobby and difficult to find in pet stores or online, so these would make a highly unique addition to any home aquarium! All Aquatic Arts (formerly InvertObsession) brand plants and animals come with a 100% live arrival guarantee, plus free email support directly from the owners!