The skeletal system of a goldfish is made up of small bones and cartilage, but it does not have hardly any bigger bones, and it is hard to tell how many there are. There are 3 main muscles in the muscular system.

bigger fish

A male has more of a V shaped tail. A female has more of a U or a rounded V and

First if your comets are not at least 2 years of age, they won't breed.

Males vent openings are concave or sunken in while the females vent opening is convex or poking out. The males have firmer dorsal fins and are more streamline than the females. The females are heavier in the abdomen area than the males.

Breeding tubers won't appear on the males gillcovers or fins until spawn. That is to say you don't have two females or two males.

They will breed once they are old enough and if they are male and female

im not so sure but one time i got a gold fish from the fair and i over feed it so mabey over feeding it or mabe they are just weak because every gold fish i have heard of last 5 days or less

If the tank is actually filled to the brim (tanks never are) the water would weigh 8.35lbs x 30gallons which is 250.5 lbs. To obtain an accurate total weight you would have to add in the weight of the sand/gravel substrate, and the rocks (decore) and the weight of the empty tank. Then you would subtract the weight of the top 1 inch or so that is always left empty.

You can prepare turtle in a variety of ways, the easiest for survival means would be to lay the turtle on a bed of hot coals for about 20 min. Then just crack the shell and enjoy. Be sure to fully cook the turtle though, they can carry some nasty bugs, like salmonella

a swim bladder

No, bettas, like all living animals, need the regular cycle of night and day. Bettas also usually relax/sleep during the night because they feel like they're in a cave and more secure. Constant light can be stressful for the fish. Even in the day, do NOT keep them in direct sunlight as this will cause the temperature to flunctuate (very stressful) or overheat, as well as promote algae growth.

No, they do not need light at night, they enjoy light but, do not keep them too close to the sun as, this may cause discomfort. They are quite easy to care for, as long as they are provided a clean environment and are fed once a day. They can live for years and years! It is usually 3-4 in a bowl and in a tank 7-8. Have fun with your betta!

Shubunkin is just a fancy name given to a specifically coloured Goldfish. Breeding one with a Golden coloured goldfish will result in about 33% that look like a Shubunkin and 33% that look like a Golden coloured goldfish and 33% that look like a mixture of the two. The above results would only be accurate if the breeder fish are properly line bred and their lineage is guaranteed. Otherwise you could get anything from coloured goldfish to uncoloured goldfish and a mixture of any kind of goldfish including Comets, Fantails and Veiltails.

Yes, I chopped of one of it's legs and sure enough in a weeks time it had grown back... if they lose an eye they will grow 5 in replacement.

Yes, a waterbutt (rain barrel), is usually fine to use for goldfish. However, if your area experience acid rain, or you live in a city, you should check the pH of the water to make sure it isn't too low (<5 is bad, >6 is best)

when fish eat other fishes tails it means they are trying to show that they are boss, or it could mean you have evil fish ( lol ), but when they do this, it is because they are being bossy and want to be the gru#oup leader, but you have to be careful because it can cause diseases like fin rot

It will kill them/it. If you are refering to salt water at the same rate of specific gravity as ocean water wich is about 1.022, Then you will definitely kill your goldfish, It will take between 1/2 and 5 hours. If your goldfish are sick or icky you can dip them in saltwater for about 15 seconds or so and that will actually help them,(possibly) this does not always help but it will not kill.
The Salt

your goldfish might die and maybe eat to much or the water starting to get dirty

on some you can but on others you can't. like a pleco you can't tell. the only way i know how is the color is brighter on male.

A goldfish will due this as a result of either an internal bacterial infection or an infestation of parasites. Raise the tanks salt concentration to 0.3% to help kill off any possible parasites. Also, Start the fish on an antibiotic medicated food. If the fish does not show any sign(s) of improvement continue treatment, only add an anti-parasitic medication to the tank's water.

They have eyes to breath on

Koi are a type of carp and can get very large. 135 gallons is not enough room for Koi to be kept for a long period of time. They should be kept outdoors in over 500 gallons, constituting a pond. Only fry can be kept in an indoor aquarium but then they will have trouble adapting to an outdoor environment.

A snail could not eat a goldfish; chances are that the goldfish is stuck somewhere on the tank under decorations (if you have any) and may be dead, or it jumped from an opening on the tank which doesn't happen often, but is always possible.

No i do not think people in the 21st century eat goldfish, but back in the 1920's they ate them because they thought it was cool, or they liked to show off, or they turned eating goldfish into a game. They usually saw who could eat / swallow the most, who ever manadged to swallow the most won how ever many dollars was bet on them. (*FACT* they did not usually chew or cook the gold fish)

yes they will it says it in the sea monkey handbook

Fish of the family Poecilidae, yes that includes Mollies, don't have the mouths to cause serious damage to each other, or other fish. They can peck at each other, but the worst that could happen is a guppy with a small rip in the tail. They can, however, eat fry. Fish of the family Poecilidae will spend more time showing off and "pushing" each other with their tails than actually fighting.

eventually, yes

None, algae indicates a problem that should be resloved.

Generally speaking No. Frogs mainly feed on insects. However during the mating season frog and toads can attempt to mate with fish, or virtually anything that is available and they can grasp hold of a fish for this reason.