Probably "ick". It needs to be treated.
It is very badly damaged and will probably die. -----improved answer ---- that's actually incorrect, unless there are signs that there was a fin to begin with, in which case it is probably fin rot... but if you are talking about those goldfish that swim super awkward and have no fins on their back, then you are talking about a celestial goldfish. some bubble eyed goldfish also come with no fins.
Goldfish do not have legs. Goldfish do have fins, although the number of fins will depend on the type of goldfish.
a goldfish uses his/her fins for direction when it swims.
fins fins
A goldfish has about 1,500 bones inside of it.
no they don't loose there fins if they do they die.
Goldfish can only be sexed during breeding season (springtime). At this time the males develop white spots on their gillplates and pectoral fins. The females simply get chubbier around the abdomen prior to spawning.
Well goldfish move their fins of course.
the difference beteen a male and a femal is at the breeding seson the femles ovals are larger then usal and in the breeding seson the male get white spots all around its fins these represent male
the difference beteen a male and a femal is at the breeding seson the femles ovals are larger then usal and in the breeding seson the male get white spots all around its fins these represent male
You should see that the female goldfish appears fatter than usual due to the eggs she is carrying. The male will have white spots on his front fins and gill covers and will pay the female a lot of attention chasing her around the tank or pond. when the the goldfish have babies?
The fins develop on a goldfish fry after about a couple days after they are hatched. Until then, they are not free swimming and look like a tadpole.