Depending on which species you're researching, you may find that it is mentioned in one of our eBooks or other resources that may not have appeared in a subject-specific database.
The National Center for Biotechnology Information (NCBI) contains data on a large number of biotechnology topics. This includes gene and protein sequences, taxonomy, and more.
MicrobeNet is a database created by the Centers for Disease Control that contains information on more than 2,000 pathogens, including bacteria and fungi. Access is free, but it does require you to make an account.
While you should NOT cite Wikipedia in your final project because it is not considered an authoritative source, you can still use it for background research. Look at the cited references at the end of an article to see links to potentially useful resources. You may even find some scholarly articles there.