There are a tremendous amount of really interesting creatures out there, always best to do research on them - even with just a quick Google search - to find out some facts about them. Unfortunately many do not do well in our tanks, or require specific type of habitats to thrive..and helping these creatures thrive should be our goal
There is a lot of conflicting information on these on the internet and in general. Success in captivity is pretty limited. The only semi successful colony I know of personally is housed in a 580gal and cared for by an extremely knowledgeable person. They show up frequently on availability lists but I would steer clear. Prior research in this hobby can save you a lot of money, time, and heartache.