I've been heading to my local dam that used to supply water to my area back in the 60s (i think?) I have found some cool plants fish and 2 types of glass shrimp. It's become quite a addiction! Not to mention my flatmates never being abel to find the kitchen colander. He he.
If anyone lives somewhere near a large body I strongly recommend checking it out. You will be surprised what you may find and learn about.
Take all your tests and a thermometer but always research you local laws and restrictions.
Have fun!!