And while I hate to argue with anyone on here, I've been raising many different species of animals for well over 15 years, and know animals exceptionally well. So when I say inseparable, I mean that they have been separated before and will stop at nothing to be in the same tank. They're in a 75 gallon tank and which get's separated in two for feedings, however they consistently break the barrier to the point where I gave up. If i pick him up to take him out, she attacks me. When I successfully get him out, he tries to climb back in. The only reason I haven't sold her previously is because when they've been in separate tanks they both kind of go crazy. So I've just figured that if I want to keep him, I'll have to suck it up and deal with her.
Also, definitely a male/female pair. They are both proven she has successfully laid eggs before (sired by him). The only reason I bought the pair was because the guy didn't know how to feed them and they were starving