The term SACS is an acronym for Soft-sided Aquatic Containment Systems, which are used to store and transport aquatic organisms. The two crossword solutions for this term are CYSTS (5 letters) and POUCHES (7 letters). CYSTS are small, fluid-filled sacs that can form in the body, while POUCHES are small bags or containers. Both of these terms are related to the term SACS, as they all refer to a type of container or storage system.