Another rarely available species here in the UK, the Crinoid Squat Lobster makes an ideal nano aquarium addition. Each squat lobster is around 1-1.5cm and the colours can vary greatly from yellow, black, striped, orange etc. They are naturally found hosting on Crinoids (Sea Lillies) where they hitch a ride to enable them to catch a larger volume of food. They do not need a Crinoid in order to flourish and will naturally find another spot where they can best catch food. They are completely reef safe and are a peaceful tank mate. They are best kept alone unless they are a true pair.