It will usually at first get white discoloration then start fraying. for medication look online at beta sites
The female has a triangular anal fin. In the male this fin is elongated into a long point. This fin carries milt (sperm) like a penis and is called a "gonopodium".
A female usually has a fan shaped anal fin( anal fin is on the bottom of the fish), and a male's anal fin is pointy, or "rod shaped".
A MALE FISH HAS A LONGER BOTOM FIN THAN A FEMALES
Look at the fish's bottom side. If the "anal fin" is fan shaped the fish is a female, if the fin is thin and pointed like a nozzle then the fish is a male. In the male this fin is called a 'gonopodium'
probably,male certainly make bubble nest,male have long fin and large gills,male dont have egg spot between the fins and bottom tail
The anal fin, is used to stabilize the fish while it is swimming.in some fishes such as trigger fishes.anal fin is used in sculling.in some live-bearinf fish,the anal fin of male is modified into a gonopodium.
male mollies, as well as male guppies, swordtails, and platies have an organ called a gonopodium near where their anus is. this organ functions as a penis, and females do not have one. where a male has a gonopodium, which is a long, slender fin, females have a normal-looking anal fin.
The male fish has a Gonopodium Particular to the Live-bearing fish, the gonopodium is the pelvic fin of the male fish that have been converted into genital organs.
You can find the gender of a guppy by looking at the anal fin. The anal fin is the closest fin to their tail below them. On a female it will look like a normal fin but on the male their will be 2 long skinny fins. The male is also much more colorful.
This is very difficult. It's done through "venting." The vent is the opening between the anus and the anal fin where the fish will excrete either eggs or sperm. Usually the vent is larger in females. It raelly just depends on the type. In some cases, if there is an "egg spot" on their anal fin, it means that the fish is male.
While the fish is swimming, look at the fin on the top of their body. If it's tall then it's male if it is short , it's a female.
If you are refering to the fishes Dorsal Fin, that is how it is supposed to be. When a fish has its dorsal down is the time when you start to worry and wonder what is wrong with the fish.