the hardest part is being away from home for a long period of time and not being able to see your family as much as you might want to
you have to research alot of stuff
While the answer varies from person to person, the most prevalent answer is having to avoid talking to Rick Moranis, as he wants to be a marine biologist and he constantly hounds real marine biologist until it comes to blows.
Being fat.
My dickk
The hardest part of a being a parent is watching your child grow up and they can't live with you anymore and move to another house
The hardest part about being a pediatrician is that you could get sick yourself from taking care of sick children. Also, you will be in a germy hospital.
Cleaning cooking
Yes they do. Marine biology has to do with the oceans inhabitants and dolphins and turtles are part of the oceans.
The intolerance of other people.
Thinking that everything you do is wrong.
the hardest part of being an astronaut is going to school and graduating to become one. then when you are done going to school then there is the challenge of getting picked.
A Marine Biologist would be who you want