are male swordtail fish aggressive?
477435
Swordtails are generally very peaceful and make excellent community fish. Males can however turn aggressive towards each other once they reach sexual maturity, so it is advisable to house only one male with several females in an aquarium.
1117823
There are many different interpretations for fin nipping. Do not worry if you see the neon tetras' fins ruined because they heal quickly. ... Glow tetras are usually more nippers than other tetras. Neon fish do not have to belong to the same species and that is why maybe they are aggressive against each other.
1371014
They are reef safe and live harmoniously with corals and invertebrates. Being an aggressive species it may be less tolerant of fish tank mates - especially new additions - so get this fish as one of the last fish to be introduced to your system. It is recommended to keep this species as the only Tang in the aquarium.
264186
However, this species will not generally attack humans and does not seem to treat them as prey. Most modern attacks involving shortfin mako sharks are considered to have been provoked due to harassment or the shark being caught on a fishing line.
136946
Males are more torpedo-shaped and have bigger fins than females. The males also have pointed gonopodia, modified anal fins they use to mate with females. Dominant male mollies intensify in color and grow larger fins to produce a mating show for females or to show dominance to other males.
77315
You should not have more than one male betta in the same tank. Betta fish are very territorial, not only will the two males end up fighting but the fact they are sharing the same space will stress your betta. ... Although they are still aggressive female bettas can live together in groups and they look beautiful.
1170285
Oscar fish are known to be aggressive. Although an Oscar fish can be aggressive, he will share his tank with other fish. In particular he is suited to fish around his own size who are neither too passive nor too aggressive. Like many species, however, every Oscar is different; some are more aggressive than others.
186530
They are not a great species to keep with any fish that has long fins, such as the long ventral 'feelers' on the gourami, or male guppies since the loaches are known for fin nipping. ... They are very territorial and often fight, they are like Betta fish in this respect.
775440
Though koi are typically gentle and easygoing fish, they can at times be aggressive and may bully other fish depending on the circumstances. Here we will cover the main circumstances under which koi can become aggressive, and what to do about them!
1272302
When goldfish chase each other, it can be a sign of one of two things. ... Goldfish are typically very docile and are not likely to fight or bully other fish. However, bullying and fighting may occur if the fish are under stress (which is the second potential reason behind this behavior).
418509
The Redtail Shark, also known as the Redtail Black Shark is great for the semi-aggressive community aquarium, as long as they are the sole sharks and the other tankmates are of similar size. ... The Redtail Shark will become very aggressive towards its own species when mature.
1087578
2. Bettas are Territorial and Aggressive — They're called Siamese fighting fish for a reason… bettas, especially the males, are territorial and will attack other male bettas (this isn't always "to the death," as commonly believed, although it can cause serious injuries).
1460650
Yes, they will breed together. But they are not schooling fish. They will however live together in the same tank without anymore issues than keeping all of one or the other. All males may fight with each other.
810376
In many species of fish, the fishes are hermaphrodites. This is common in many ray-finned fish. The advantage of this is that any fish can mate with any other fish. This can be very important when population densities for a species grow low and they must mate aggressively into order to repopulate their species.
1369156
Bettas are Territorial and Aggressive — They're called Siamese fighting fish for a reason… bettas, especially the males, are territorial and will attack other male bettas (this isn't always "to the death," as commonly believed, although it can cause serious injuries).
1212837
There are 3reef members that have damsels and clowns with little to no trouble. I feel that you would ok in doing this, but the fish will still size each other up and possibly fight during the first couple of days. Once they establish territories and live with each other long enough, they should be fine.
588581
Fact #2: Their Color Enhances with Age. ... Outside of their pretty colors, having more than one male rainbowfish in your tank means that they may become aggressive towards each other and can injure each other during breeding season.