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That depends on the type of extension. If the scales are sticking out like a rasp then the fish has a fatal disease called Dropsy. If the fish is just getting chubby it could be due to one or more of many things from constipation through to full of ova (eggs) and ready to spawn.
What else can I help you with?
Do fighting fish give birth?
When your fighting fish is about to give birth, it will have a white extended belly.
What is a goldfishes proper name?
Carassius auratus
How much do goldfishes eat?
Goldfishes usually eat tiny bits of vegetables or meat...
How dirty is your belly button?
Not very.
How many legs do goldfishes have?
goldfish don't have legs
When is a goldfishes breeding season?
It is from Spring to early Summer.
How can i get my goldfishes to reproduce?
=you can leave them in a tank on their own for a few days=
Which type of fish has a skeleton made of hard bone?
goldfishes
Is your bellybutton ticklish?
Yes. His belly button's very ticklish. If someone touches his belly button, he quickly puts his hand on his belly button and laughs.
Who invented a towel rack?
your mums fishes goldfishes bum of a mum
Why your goldfishes are fighting each other?
if they are males, yes ,if they are male and female no.
Do goldfishes have scales?
Yes they do.
