IMPORTANT: The size of these crabs is EXTREMELY SMALL (½ inch max diameter). This set of crabs is not a starter kit and is recommended for experienced nano aquarists and shrimp hobbyists only!Thai Micro Crabs (Limnopilos naiyanetri) do best in tanks with plants (i.e. Marimo Moss Balls) or décor that provides cover (i.e. a stone or ceramic house, bridge, wooden log or branch, etc.).Also called “false spider crabs,” they are fully aquatic. No special accessories are needed other than an aquarium heater or heat element, pump (i.e. eco air pump or sump), filter, skimmer, etc.They’re bluish white and luminescent like a jellyfish, bug like in appearance, and resemble spiders with their unusually long legs. They can live with some species of small, peaceful aquarium fish.All Aquatic Arts (formerly InvertObsession) brand plants and animals come with a 100% live arrival guarantee, plus free email support!