Aphanocapsa delicatissima is a cyanobacterial species typically found in freshwater habitats, where it forms small, spherical to ellipsoidal cells either individually or in colonies. These cells are encapsulated in a thin, gelatinous sheath and exhibit colors ranging from greenish-blue to brownish. Aphanocapsa delicatissima contributes significantly to aquatic ecosystems through photosynthesis and nitrogen fixation, playing crucial roles in nutrient cycling and supporting various organisms within freshwater environments.