The field of pharmacetuicals really interests me but I also have a real interest in things like marine biology and animal studies and that area of biology. I was wondering if I could combine the two areas that I really like into one career. Or maybe work as a pharmacist and then as a biologist on the side or something like that. I know this wouldn't work in medicine but can it work any way in pharmacy?
I would say probably not in the way you're imagining. I am currently a grad student in molecular biology, and research is an all-consuming job. It'd be hard to work part time as a scientist, as you wouldn't get much done. If you worked full time as a scientist and worked in community pharmacy part time, it'd be hard to get off to do your pharmacy work. I've gone to work planning on spending six hours on my experiments, but something goes wrong and to not throw away two weeks of work, I stay for ten hours.
You can certainly get a PhD/Pharm D. Those individuals do research with a pharmacy perspective, and it sounds like a good job for someone with your interests.
I originally went into grad school because I liked science. However, I found out I didn't much like research (you can spend months, even years on a project and find out all that work didn't get you much). I have friends that love it though, and live for that thrill you get when you find out something no one else knows. I'm now planning on going into pharmacy because I really want to do patient care. I think it'd be a great fit for me.
I'd suggest figuring out which you like better, research or patient care. If you love research, go ahead and go for a PhD. Look into what kinds of biology really interest you, and then let that determine what field. If you really like health care research, then think about getting the PhD and the PharmD. You could always quit research and work just as a pharmacist (although if you leave research for too many years, it can be hard to get back into it, apparently).
I don't know if you've done this yet, but pick up either Nature or Science and flip through it. Even Scientific American would work. Figure out which articles you like reading. That would be the kind of research you'd probably like the most.