Goldfish

The fish could have been bred to have a curled tail so it could be genetic. It could also be caused by the fish having been kept in a tiny container or the tail could have been damaged and the regrowth (scar tissue) has made the tail curl.

No they can not survive together. The African Zebra fish (Diplodus cervinus) is a Marine species. The Neon Tetra (Paracheirodon innesi) comes from the Amazon river and requires very fresh water. Either fish would die given the water conditions required by the other.

One goldfish requires at minimum 20 gallons on it's own plus 10 gallons for each additional goldfish (30 gallons for 2 goldfish). It's not only because of how big they can grow, but because they are very messy fish & produce a high amount of waste

if the goldfish is smaller then the head of the turtle, it will eat it! if it is bigger then half of the shell it will be fine but not if your turtle gets bigger. if the fish is to big to eat but small enough for your turtle to target, it may kill it, or try to eat it and choke, killing your turtle.

Unchlorinated water, such as bottled distilled water is best.

That is most likely a string of feces hanging off of your goldfish. It will break off eventually.

This is going to depend on if the black spot was part of it's colouring when you first got your fish, or if it appeared at some point while in your tank, and went away at some point after you did a water change.

If it's the second part, then that would be an ammonia burn which is caused by poor water quality in the tank.

Well, it is either the lack of food you have given them, not cleaning out the tank which has their feces splattered all over, or not meeting the requirements/ special demands the fish needs to keep it's insignificant life continuing on and forth until it's rotting flesh, moldy, slimy carcass floats up to the top of the tank. There you are sport...

If you have an actual bowl and not an aquarium, then you would not want to be putting a lid on. Goldfish bowls have very small surface area for the water and that affects how much oxygen your fish can get. They actually aren't that good for them. Putting a lid on would reduce this even further. Aquariums can be covered with glass especially supplied, although it won't be a complete cover.

Keeping fish is actually a lot harder than people think. So be prepared for water and electricity bills and constant feeding and cleaning. No fish is easy to keep. Fish are also very good for mental wellbeing as they are know for relaxation when kept inside your home. The type of fish you want is completely personal taste. Tropical fish are much more prettier and brightly coloured but require a heater in the tank. But the are also some interesting exotic cold water fish available

They're measured in gallons in the US, and liters everywhere else.

This holds true no matter how big the tank is--the New England Aquarium in Boston has a tank they describe as holding one million gallons of water.

If you are wondering why a previously colored goldfish is suddenly turning white, it's a lack of light. Other than that, many goldfish naturally change colors throughout their life.

when the water starts to get dirty if it is a bit dirty then leave it when it starts to get really dirty clean the filter and your fish tank

Fancy goldfish need at minimum 20 gallons for one fish, plus 10 gallons for each additional goldfish you are adding (thus 30 gallons for 2 goldfish); so the answer to your question is dependant on the size of your tank.

If the fish has warm enough water, with sufficient aeration and food, then it's probably not well. Goldfish may die after three years, so if your fish is that age or older, be prepared. I know it's hard to lose any pet , I still my Betta,Bruce, after two years, but it is natures'way, and it not realistic to spend hundreds of dollars on a$5 fish.If you see no discoloration of the scales, it's old age or an internal problem. I'm so sorry to not give you happier news.

Fish are warm blooded animals. They do not have much of a problem with a small change in temperature. Cold blooded animals such as snakes need to keep warm and can sometimes be seen laying on rocks to collect heat from the sun. Now fish do slow down in water that has a larger drop in temperature. They can almost become dormant, but still need to move and eat but at a much slower rate. Just like any other animal a fish could suffer from hypothermia. if you are talking about pondfish, they will survive if the water is deep enough if it is a small shallow pond it maybe better if the fish would be taken inside. If you are taking tropical fish in an aquarium it is best to keep the temperature as steady as possible. But if that is not possible they still should survive but not for a long long time. It is always best to double check with a trusted store that sells fish.

They are very-low maintence,so bigger fish than a goldfish would be messier.

Yes it is. It pretty much means that you haven't kept your tank clean enough for your fish. In fish food, there is a large amount of ammonia in it. Your fish doesn't eat all the food you put in the tank and even of you have a filter, it doesn't neccesarily mean that your tank is really clean, it only helps. So, in other words, it's ammonia burns on your fish! Sooooo CLEAN It! After it settles into some new CLEAN water, it'll go back to normal. Justremember to change the water at least once a week. It's not good for your fish to live like thy for a period of time or it happen alot.

Every week or every other week, depending on the size of the tank and the number of fish in it. The smaller the tank, and the more fish in it, the more often it will need cleaning.

The girl tends to be bigger than the boy.

It's not easy to tell them apart.

The males don't get into fights and the females don't have marks, different colors like a lot of other animals, so it is hard to do it.

Also at some time of the year the female goldfish will get a bit fatter because she is full of goldfish eggs. With experience by observing them is possible to learn how to tell male and female goldfish apart by the thickness of their fins, the shape of their pectoral fins and the straight/thickness/firmness of their abdomens.

Of course they do! They can't live if they don't! I have 2 goldfishes which live in separate tanks, and theres only 1 oxygen machine,and we only used it on 1 goldfish, and then the other died!! So yes, they do need it!!

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ANOTHER ANSWER

the important thing is that there is oxygen in the water. i achieved this by digging a half metre deep pond in the garden (hoping this is deep enough to not completely freeze in our winters), covering with tarpaulin (you're supposed to have a carpet underlay and overlay to stop the plastic photo-degrading and make it last for years). i filled it with tap water and left it a couple of days to let the fluorine evaporate. then i went to my local pond and got lots of completely submerged plants to oxygenate the water for a week. i also added floating water plants from the pond to provide some cover from sunlight in areas and some marginals with roots in the water to plant round the edges to provide protection and stagnant water for insect larvae which the goldfish feed on. i added lots of pond water-snails to eat dead leaves which have formed a mulch. i bought some shrimp to breed in the pond for food too. i added the goldfish by leaving their bag in the water for an hour before opening it so they could acclimatise to the temperature. one week later and 5 of my 6 baby goldfish look healthy; they have perky sticky-outy fins, swim quickly and are growing much more quickly than i thought they would, their gills are not moving too fast and they are not gulping oxygen from the surface of the water. one looks floppy and lethargic at the bottom of the pond. (aside on my injured fish: i mistakenly poured the fish out of the bag into the pond, leaving one fish trapped and struggling in the plastic in the bag without any water for a second. i think fish injure easily and should have put the opened bag in the water and let the fish swim out. blood-worms from the pet shop have made short work of the dead carcass and my now larger goldfish eat them ravenously, though i really should have quarantined the injured fish. the excess of plants absorbing nitrates and plant cover not allowing much sunlight into the water mean the pond is still clear and i have no algae, though i suppose algae would oxygenate the water too. i find green water unsightly and like to watch the fish.)

Yes, it can. Once in awhile you have to check if your goldfish is making beeping sounds, if so you have to soak it in lemon juice to stop the beeping noise,or else the fish will explode on you (you will be covered in fish guts) so be sure to check your goldfish once in awhile (possibly every second)

Well yes, you can but only if it is little,, because I have two a big one and a little one. The smaller one is in a five gallon tank but eventually they get big so they will need to be moved into a bigger tank, but if you have a small one then it should be fine for the time being.