Hello, I recently set up a new 30 aquarium and added purchased 8 fish (then today added 5 more.) And after reading up on some of my fish, I realized that my female swordtail seems to have a black gravid spot on it's abdomen, which I read was a sign of pregnancy. She will also rest on the bottom of the tank in a corner, sometimes with the male coming to rest by her, for significant periods of time. I don't seem to see any unusually swelling to her abdomen, but then again it's a new fish, so maybe I'm mistaken. Is she pregnant? (I also provided a picture,hope it helps, sorry if the quality isn't the best.) Any help is appreciated.
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