Weight:
* Size matters: Goldfish weight is largely determined by the breed and how much they're fed. Some breeds, like the Comet, can grow over a foot long, while others, like the Celestial Eye, stay much smaller.
* Diet: A goldfish that's overfed will be heavier than a goldfish that gets just the right amount of food.
* Age: Goldfish continue to grow throughout their lives, so older fish will typically weigh more.
Height:
* Shape is key: Goldfish have different body shapes, with some being more elongated and others being rounder. This affects their "height" in the water.
* Finnage: Fins can be long and flowing or short and compact, also influencing their "height" in the water.
Shape:
* Common goldfish: These are the most basic and popular type, with an elongated body and a single dorsal fin.
* Fantail: Fantails have long, flowing fins that create a fan-like shape.
* Telescope Eye: These goldfish have bulging eyes that point outwards, giving them a unique appearance.
* Oranda: Orandas are known for their large, fleshy growths on their head, called a wen.
* Lionhead: Lionheads are similar to Orandas, but their wens are typically larger and more elaborate.
In short, it's impossible to give you a single average for weight, height, or shape. It all depends on the specific breed and how the goldfish is cared for.
If you're interested in learning more about a specific breed, you can search online for information about its size and shape.