If you're interested in fish or herps, a lot of Aquariums have volunteer positions where you'll clean tanks, feed fish, help visitors etc. As far as getting a job in biology, it's a HUGE field and things become very specialized. Most biology jobs now require a minimum of a bachelors degree, I know a lot of Fisheries jobs are giving preference to those with Master's or PhD's. There are often seasonal positions which are good to get your foot in the door, but they're short term (2-6 months) fairly low paying and still will give preference to folks with a degree. The best thing to do is just start putting applications in and go from there. See what the requirements are for the jobs you really want and take steps to get those requirements.
Good Luck!