Angel Fish are actually very vicious. They are usually paired alone for what I know of.
Angelfish are nearly impossible to sex accurately. Occasionally fully mature males will show a modest nuchal hump, which is a bump on the head just above the eyes. However, don't count on it. The best way to establish a mating pair is to purchase a half dozen immature angelfish and raise them together. When they are mature enough they will pair off, and you will have at least one breeding pair out of the group :)
This site has a lot of information on breeding:(excerpt)From a group of 10 Angels, we usually got three or even four pairs. But if you try to purchase a pair of mature Angels, often the pair bond will be lost when you move them. So we recommend that you get small Angels about 3" tall. Raise them up together and allow them to choose their own mates.* http://www.aquariumfish.net/catalog_pages/cichlids_neotropical/angel_fish_breeding.htmAnother Excerpt:The first thing you are going to do when breeding is to start to pair off the Angelfish into groups of 1 male, 1 female. You want to start out by purchasing 8-10 angelfish, try to get an equal number of males and females. After you pair them off, they should bond together and start to pair off, swapping them out should pose little problem. Don't get discouraged if the first spawn doesn't turn out as planned. It is normal for the first batch to get eaten or not to spawn at all, you should just get a few fry out of the batch. With the fish that do pair up and go off to spawn, you should be able to get plenty of fry from their efforts.* http://ezinearticles.com/?Breeding-Angelfish&id=1441557
Yes, a pleco can be kept in a breeding angelfish tank, but care should be taken to ensure compatibility. Plecos are generally peaceful and can help with algae control, but they may disturb the breeding pair or fry. It's important to monitor their behavior during the breeding process, as the angelfish may become territorial. Providing plenty of hiding spaces for both species can help reduce stress and aggression.
Best bet to get a mating pair is to buy 3 - 5 small angelfish and allow them to "pair off" and then to return/give away remainders as they will only cause interference and usually damaged fish from fighting. Once a pair has been selected and reared to maturity, keeping proper water conditions, ensuring no "bully" or more aggressive fish is present, while providing spawning areas is the only thing you must do, The fish will do the rest. I answered in a vague and general way due to the nonspecific type of angelfish as there are fresh and salt. This answer is suitable for most fish, in both types of waters.
Do you have the space for them? because freshwater angelfish are generally good parents. however, you should separate the fry by gender when they grow older.
I am aware that Angelfish and any kind of Frogs should NEVER be in the same aquarium so I do not know the answer to your question.
Yes, they can. Note that the angelfish will eat the baby livebearers when they are born, and please make sure you have plenty of room and the correct water parameters for the angelfish. A pair of angelfish need at least a 35 gallon tank to reside in. The water should be around 78F to 80F., pH 6.8 and soft. Be sure to know that they have zero tolerance for ammonia and nitrite so they need good filtration running permanently. They also need at least a 50% water change every week to allow each fish to be, overall, happy and healthy.
Separate them.
Black Ghost Knife Fish are semi-agressive. They should be fine though. The angelfish should be fine.
No it is not, as you can see, the queen angelfish is much more colourful. The angelfish is just black and white. Except for the male, it is colourful but not as colourful as the queen angelfish.
There are not many fish that are compatible with Angelfish. Only Angelfish are truly compatible with Angelfish.
Angelfish (Pterophylum sp.) do not get pregnant they are egg layers and deposit their eggs on a broad leafed plant or PVC tube provided (sometimes the aquarium glass). Then they look after the eggs and fry until the fry are independent.