Fishing licenses are issued by the state, and the rules vary. In at least some states, those under a certain age do not need a fishing license, though they may need special endorsements to take certain kinds of fish (for example, in Missouri, if you are under 16, you don't need a fishing permit, though you do need a trout stamp if you are fishing for trout).
At the age of nine months
You Can Fish At Any Age
depends on what fish you have.
the same way they fish now!
Umpa lupa fish
The Devonian Period
their teeth
500
they mate at the age of nine months
It helps fish age faster than others.
When you hold the fish it will say what kind its status(which will say pregnant) and age
Not only can they behave differently, they can look different too. Some fish will move more slowly, some fish may appear to be "resting" more often. Some fish colors become more vivid with age, some fade with age. Some loose their markings with age, and others develop other markings as they age. So it's not really easy to answer that question when talking about all fish. When talking about a specific fish it's easier to answer.