I'm having some crustacean confusion...I've been trying to look on the net but havn't found an answer. I have seen porcelain crabs sold as "porcelain crabs" and "anemone crabs". Is the anemone variety dependant on anemones? They look identical to ones I've seen sold with no mention of anemones, so I'm wondering if my eye just isn't trained well enough to see a difference, or if it really is the same animal and it doesn't require a nem...I'm confused