He is too young to tell. I am thinking boy, but I don't think his sex organs are developed enough to tell. You typically need to wait until they are 8-10 inches long. Try again in a month or two!
I just set Swordtail's timer for his bath and paused it so I could actually fill his soaking bowl up and he crawled over my phone and canceled the timer
Mirage came out of brumation on April 26. He was doing great. On May 2 he started acting funny. We just redid his tank, and he keeps going into one of his hides. He just lays there. He shows no intrest in food. HELP!