Maryland Fishing License Cost

In Maryland, do you need a license to rent / car / boat unit, more specifically at the point of looking out?
A group of friends and I 20-22 age range are looking for something fun to do and we thought about renting a boat and maybe go fishing (for those of us with fishing licenses). Probably will be 8 of us and we are also wondering if there is a limit on some ships (size / occupation / etc.). Also, if anyone knows how about it would cost to rent a boat big enough for many people, please let me know. Thanks:)
no license required, the boats are limited to # of people allowed .. bigger the boat the more people that can hold google .. Search boat rental in your area costs for different companies pontoon boat is a better bet.
"Real ID cards"