If you keep pet goldfish, you have almost certainly spent many hours watching them go about their daily lives, interacting with their surroundings and each other, and doing all of the normal things that goldfish do! But have you ever watched your goldfish swimming around and wondered exactly why they are doing what they are […]
Goldfish Facts & Info
All good goldfish keepers take the time to learn about their pets. Knowing more about goldfish helps us to take better care of them.
Why not start by learning the 12 mistakes most new goldfish-keepers make?
You can also explore diseases, like swim bladder disease, and learn how to prevent them.
Our Goldfish Facts & Info articles are where you can learn all of this and much more about your goldfish.
Black smudge or black spot in goldfish is probably one of the most commonly seen goldfish health problems, and one that has many different potential causes. Black spots or smudges are often indicative of disease or illness in the goldfish, and many goldfish will display blackening across part of the body or the fins and […]
Something that fish keepers often ask themselves when they watch their goldfish swimming around in their tank is “are my fish happy?” Of course, goldfish do not purr, wag their tails or have other obvious ways of indicating their mood to us, so it’s not always easy to tell! However, if you do everything in your […]
Cotton mouth is not one of the most common afflictions of goldfish, but is one of the more serious ones and one that often gets wrongly diagnosed. It can lead to a wide variety of health problems in the goldfish, and should be dealt with as soon as it is spotted, as it is very […]
“Flukes” in goldfish doesn’t refer to an actual disease, but rather a parasite, which comes in two different varieties depending on whether it affects the body or the gills of the fish. Flukes are one of the most common types of aquarium and pond parasites, and one of the largest too, which can be seen […]
The condition of “velvet” in goldfish might sound rather prettily named, but in reality it is anything but! Velvet, or to give it its correct name, “Oodinium,” can soon take over a whole tank of fish, and have a significant effect on the health and wellbeing of your goldfish within a short space of time. […]
The rather alarmingly named condition “hole in the head” is a disease that can affect both goldfish and tropical fish, and is often the result of keeping your goldfish in poor-quality water over a prolonged period of time, either due to an overcrowded tank, insufficient cleaning, or water changes that are too infrequent. Read on […]
Have you got a goldfish with big eyes? Have you suddenly noticed your fish’s eyes look bigger than normal? You may be seeing a condition called “Pop Eye”. Pop eye, also sometimes known as “exophthalmia” isn’t strictly a disease in and of itself, but rather, it is the result of another underlying issue or infection. […]
Lice and worms are common goldfish tank parasites, both of which can potentially lead to health problems in your fish and so, should be dealt with as soon as a potential issue arises. What are goldfish lice and worms? Fish tank lice and worms are parasites that rely upon goldfish to thrive and reproduce, and […]
This is a guest post from Ricky at swallowaquatics.co.uk. Remember how Seymour thought Audrey II was the most amazing plant he’d ever found in Little Shop of Horrors? If you haven’t seen the film, spoiler alert – the plant starts eating everyone. Of course, it’s unlikely that invasive plants in your goldfish pond are likely to […]