I was playing the online version and didn't breed anything but got the magic fish of fertility. Is this normal?

It is possible to get that magic fish from eggs.

can you get all majic fish from the eggs or is it just certain ones

Only certain ones. However, the online (Flash) version of the game is very limited. Most of the Magic Fish require higher levels of Fish Environment.

You can most all fish from the eggs. Majic fish included.

It's true that you can get every single fish by *starting* with eggs and breeding the resulting fish. But not every fish can be hatched from eggs.

ok thank u

are the rarer fish more valuable

Yes, they are.

wots the one to keep hold of for easy money making