It is most unusual for any kind of female adult livebearer to be not pregnant. The ventral fin in a female livebearer is triangular in a male it is finger shaped.
2794.0
0
0
11.36 rounded to the nearest thousands place is zero. However, 11.36 rounded to the nearest thousandths place is 11.36
100
52 is rounded to the nearest thousandths. However if you need to indicate that it is, you should write it as 52.000
1000
91.000
Have you never noticed that fish come in many sizes .
Ummm.maybe you just got muscles there! xxx
23.4
397.0