Depends on what he looks like, or does. Maybe something that has to do with fire, orange, or if he's fast bolt, lightning.
the rosy red fish is the boy.
I wouldn't; rosy red minnows are usually full of parasites.
The male Rosy Barb has a black tip to his dorsal fin the female does not. In breeding condition the male is much more rosy than the female. Males are know to have dark areas under them. Plus they are much more pretty than females. Usually males look like females and females look like males.
The males are mostly a deep red while the females are a deep yellow. In overcrowded or dirty tanks where the fish become sick, the males lose their colour. Females are often the smaller of the pair and wider. Sometimes, one can see what looks like an ovipositor protruding from her vent. My female was a dull yellow when I got her but once she really got into breeding, she was then a rose color too, just not as strong as the male. She was very pretty too!
They do not show certain actions that inform you that fishes are about to lay eggs. The fish's abdomen will get bigger, and the male fish can get aggressive at times. Gold barbs scatter their eggs wherever they please, being egg-scatterers.
A barbed penis is the external male reproductive organ with a particular structure at the base that looks like a "barb" or a spiny projection. In cats, this barb keeps the male and the female together until the male's sperm has time to fertilize the female's eggs.
to tell the difference between male and female rosy red minnows, look for vertical stripes and fleshy growths on the head. Females lack both.
Fighty McSwimmypants
Generally the answer is no. The only reason the should be put in together is for breeding purposes and this should be carefully monitored as it can get out of hand. Male bettas will attack females.
The answer is yes. Fish do need at least one male in the tank to fertilies the eggs. However in some cases the fish will first lay the eggs then the male will fertilize them.
The Tiger barb is a semi-aggressive species and they will form a social order. This social order can be extended to include other fish as well. The amount of fish that you keep in your aquarium depends on the size of your aquarium and the size of your fish when they are full grown. Injured fish should be quarantined since the Tiger barbs can attack wounded fish. Fish with large or exceptionally long and flowing fins are not recommended in the same aquarium with Tiger barbs. The Tiger barb will usually become mature enough to mate when it reaches a length of about 1 inch or 2.5 centimeters long, and this will typically happen when the fish is about seven weeks old. I have successfully mated Tiger barbs. To determine if Tiger barbs are male or female, the female Tiger barb is larger than the male which has a rounder belly and they have a distinctive red nose, and above the black part of his dorsal (back) fin you can see a red line that is characteristic of the Tiger barb. The dorsal fin of the female is mainly black. In most of the fishworld, the male is usually more colorful than the female. If you want to breed freshwater Tiger barbs in your aquarium, the best method is to keep a group of Tiger barbs together and let them form their own pairs. They are egglayers. Some fish like black mollies are livebearers. When egglaying fish are ready to spawn, they usually build a bubble or foamy safe place to lay their eggs. Because fish eat their own or other fish eggs, these foamy safeplaces should be in a breeding tank or a seperate tank. Removing the adult fish after spawning is really recommended
If there is a male and female beta fish, the male probably ate them, and those 2 unlucky babies were definitely male. (male beta fish will kill other fish.)