20 millimeters is 0.02m
They will grow if they have a big enough tank and you are taking good care of them. The only thing really stopping there growth is the size of the fish tank. They can grow over 12 inches long.
it was the same size as the titanic
there is no actual size. depends on your hormonal growth development.
They grow about 8mm, but if in a very good and big environment, they can grow up to 20mm.
Really big
yes they are. they will grow really big!
It can be any size, really.
REALLY REALLY BIG LIKE 38 F!
Really big.
it's really big,huge
it might be really big or really small or medium of course it has to have a size