We have 50 gallon vivarium that contained a proven sexed pair of powder blue tincs. Over the last couple of days, the two remained separated from each other voluntarily. They had normally been close by each other, occasionally courting. We recently cleared out some overgrown plants, but no major changes in their environment. Last night, I noticed the male on the floor of the vivarium in a very odd position. Fearing the worst, I misted some RO water on him to see if he was still alive. He was. He didn't move much and I had fed them flies - he let them go all over him with no reaction. His legs looked splayed out to the side, still tucked under him, but flat to the ground. I coerced him out of the back with a little more mist and he hopped to the center of the tank, where the female was close by. Suddenly, the female aggressively tackled him, and sat square on top of him. I don't think it was a mating position considering the aggression and position (I will try to attach a picture here). After that, I isolated him, but I feared the stress would do more damage. I opened his isolation container in the tank and let him stay there. He never got out of it and we found him dead this morning in the container, not far from where he was last night. We had these two for over a year and we don't know their age. Has anyone got an idea of what this could have been? Why the sudden aggression by the female? Could it have been mating (we have no eggs to show for it if it was)? Could this affect the female? Is it time to isolate her in case?
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