I have lost one gambusia (a.k.a. mosquito fish), and gained one gambusia. Spot my melanistic male turned up dead one morning, despite all the water parameters reading normal and the two females being in good health. But later the same day I saw "Fry" lurking in the duck weed.
Gambusia fry tend to stay near the bottom early in life and then emerge to live near the surface once they a little too large to become a snack for their parents. Fry is my first next generation gambusia and he is showing signs of being a male with the same melanistic spotting as his father.
Fry is growing up fast, and the spotting is becoming more pronounced.
Several more gambusia fry have also appeared.