Symbiosis can vary between mutualism, parasitism, and commensalism, tho these grade into each other, it is often difficult to tell which is involved in a given relationship.
1. Healthy
2. Space
3. Recourses
4. Lower
5. Food supply
6. Increase
7. Emigration
I believe the albino alligator born in the wild would have a hard time surviving. Due to it being white, the alligator would be camouflaged and therefore easier to spot. This causes a number of troubles, including being unable to hunt very well.