These are some of the more common creatures you will find in your aquarium and a little info about them. A healthy ecosystem contains many life forms and not all creatures found in your aquarium are a problem, in fact many are a sign of a well established and healthy tank/ ecosystem. So before you go starting a chemical war with them, take the time to know what it is you are looking at and if they are actually a problem. Will Cause problems if found in Aquarium to Juvenile shrimp. Damsel f