From what I understand blue linkia stars can be difficult to acclimate. I would stick to the serpent star for now as they are very hardy. I would say that serpent stars are more of a opportunistic scavenger than a carnivore. Yes they will eat meaty foods but it is unlikely that it will hunt down and prey on healthy tank mates. I just recently acquired a serpent star from FloridaPets. I posted a thread about it last week with a photo of the star. This is also usually a common item at local stores. Usually they will hide underneath a rock with only an arm or two sticking out and can be difficult to notice if you are not looking for them.
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