A High School diploma is all you require to enlist.
no
To become a marine engineer you would need to obtain a bachelors degree in marine engineering, ocean engineering, or mechanical engineering. Typically that takes around 4 years. The following link provides more insight on what it takes to become a marine engineer, http://www.degreefinders.com/education-articles/careers/how-to-become-a-marine-engineer.html
I doubt you have to intern, but it probably looks really good on a resme to get a marine biology job.
You do not have to go to college.
i beileve u need 6 years 3 for studying and 3 for practicing
no
You'll need to major in Marine Biology, unsure about number of years you need.
up to about 6 years
5 years
None!
Four years
5 years