I was under the impression that you would need two a male and a female, when it comes to S. Haddoni. The one I have is eating very well at least 1 whole shrimp every 3 days. My concern is that with it being 12" across that there is a possibilty that it would split soon. Not that would be a bad thing, just that in a 120 might not be a whole lot of space. If splitting is a possibility any ideas on what size it would reach, or any tell tell signs? Thanks