Goldfish

A fat goldfish is unhealthy, and the reason for the fattness of some goldfish is because of over-feeding. Though a goldfish owner may think that their goldfish are really hungry because they eat everything the owner puts in, a goldfish will really eat anything as mcuh as it can like it is really hungry. The biggest mistake goldfish owners do is overfeeding their poor goldfish. I always give my goldfish one day of fasting per week, but a fasting day isn't necesarry when you feed it the right, small amount.

Very dark, all the time, but truthfully it isn't healthy for the goldfish to be subjected to such conditions and it is just plain cruel to force a goldfish to stay in a dark room all the time.

no other wise it cant get the magic sparkles it needs from the water

no

It depends what food the other fish eats. Bettas are carnivorous, so they eat meat. If the betta food is meat (which it most likely is) and the fish you want to feed is a also a freshwater carnivore, then, chances are, you can feed the fish betta food.

Beta fish are solitary fish and generally will attack/annoy any other fish until they are dead. Check with your local pet shop that sell fish to inquire about what, if any, fish can co-exist with Beta. it all depends on how aggressive you betta fish is, i own two male bettas, i placed my first one in the tank with 3 other goldfishes and they get along fine, however when i replaced the 1st betta with the 2nd one, it was the more aggressive one and attacked my other fishes...... my suggestions is to buy a seperator for the betta and have it get use to the other fishes for the first couple of weeks then place them together. just a heads up, doing this can cause a betta to get stressed out, so be on a look out for simptosn of ick hello!

No. If it's small enough for the Goldfish to try and eat it, it will. If it's a larger type of crab, like Fiddler or Rainbow, then these need salty water and land to get out on and will try and catch and eat a Goldfish.

No. What happens in a fish tank is that ammonia is produced from the fish's waste (it is excreted through the gills, and their poo and uneaten food rapidly breaks down into ammonia). Plecos, by the way, are very messy fish. There is no way to prevent this from happening, and ammonia is extremely toxic to fish, even in tiny amounts. So the ammonia needs to be removed. The bacteria that change the ammonia into non toxic substances live in the filter, so without a filtration system the ammonia in the tank will build up and build up, killing the fish very fast. In order to sufficiently dilute the ammonia without a filter, you would have to do huge water changes several times a day, and in the sort of tank (100 gallons) required to support a fish as big as a plecostomus, this would be logistically impossible.

As far as overall look and behaviour outside of breeding season, no. During breeding season, your female may become a bit fatter with eggs, and your male will get breeding stars on his gill plates and along the pectoral fins; these look like tiny white bumps.

They do not have eye lids, so they cannot have eye lashes. Lashes are also a form of fur so the only kind of animals with lashes are mammals.

If they are not friendly goldfish species than they will but in general they don't. If they do than you probably don't feed them enough but that is really unlikely.
yes they do. Its all a matter of size.

they get very slow and dont won't to play much and always lay down

In most cases it's due to overfeeding and constipation. Ryukin goldfish are more prone to this due to their body shape, so make sure that you feed cooked & deshelled peas at least once a week to help avoid constipation.

Typical signs of goldfish illness include lack of appetite, loss of scales, loss of coloration, abnormal spots on the fish, staying at the surface of the water, and swimming upside down or on its side.

Domestic cats are highly predatorial, wary, inquisitive but not very persistent creatures by nature when an easier meal is available. It is more of a play and curiosity scenario rather than a full attack, and may only last a few seconds to a couple of minutes, then it usually looks for more mischief to get up to after a short nap.

A Terrapin has a very hard shell and is usually sufficiently protected from most household cat attacks by tightly squeezing itself inside its' shell.

Some cats on the very rare occasion, have been known to persist for long periods and use their claws to dig inside the shell to eventually get a hold on some fleshy part, and may eventually make the poor terrapin stressed enough to lose its struggle to remain tightly packed in its shell. So the answer is unlikely, but possible, as most cats lose interest very quickly.

A larger cat such as a Jaguar and bigger, would have more success due to their larger size and more powerful bite to enable them to crush the shell. Jaguars have been documented eating tortoises on many occassions.

Sometimes fiddler crabs or other crab species are sold for aquariums. Most require brackish or even saltwater. Few thrive in freshwater. Most require live insects, worms, and/or small fish to eat. They can harass or kill other small animals in the tank with them. Many have nasty pinchers. For this reason, they are best suited to a set-up solely for them. Almost all of the crabs sold for "freshwater" tanks require a haul-out spot. The water level must be low enough to allow them to get in and out of the water with ease. If denied the ability to get out of the water, they will eventually die. They most likely also require full spectrum lighting over the basking site but studies probably have not been done on this. Fiddler crabs and similar species stay relatively small, at a few inches in size.

Provided you have a combined heater/thermostat, thermometer, and filter and the tank is set up with substrate, plants and lights, you could have fish from many species in your little aquarium. Many small Tetras come to mind as do several small Gouramies, small Danios and even some of the small Cichlids like Rams. The rule to remember is 1" of fish needs 1 gallon of water so that you don't overstock and have disease and other problems.

um...... this is an opinion but for me its bubbles,bubba,goldie,fish,percy jackson, and these are weird but u might like them : hippo,bob,seal,ocean,goat,blair, ect. ok just random words :) i could think of !000,0000,0000 of names

There are many reasons why a goldfish would die; it may have died of old age, poor water quality, overfeeding, deformity, or the most common reason is disease.

or it is because of that stupid crap you feed it. it prefers dirt.

I have had my goldfish for 12 years and in the last 2 years it has developed a habit of splashing with it's tail as I walk by . It does this about 2 times a day when it is hungry. If I don't feed it it will splash every time I walk by until I do feed it.

There will be a problem either with the water or the diet. My advice is to do a few large water changes taking all the proper precautions and equalising all parameters. Then I would improve the fishes diet by adding a feed of earthworms at least once a week.