Herring fish belong to the family Clupeidae, which contains nearly 200 species. They are small, streamlined schooling fish that feed on plankton and live in both freshwater and saltwater.Herring have a single dorsal fin and protruding lower jaws and are silvery in color.erring fish belong to the family Clupeidae, which contains nearly 200 species. They are small, streamlined schooling fish that feed on plankton and live in both freshwater and saltwater.
DRUG DESCRIPTION. ESTRINGÂ® (estradiol vaginal ring) is a slightly opaque ring with a whitish core containing a drug reservoir of 2 mg estradiol. Estradiol, silicone polymers and barium sulfate are combined to form the ring.hen placed in the vagina, ESTRING releases estradiol, approximately 7.5 mcg per 24 hours, in a consistent stable manner over 90 days. ESTRING (estradiol vaginal ring) has the following dimensions: outer diameter 55 mm; cross-sectional diameter 9 mm; core diameter 2 mm.
The moons Prometheus (right) and Pandora orbit just inside and outside the F ring of Saturn, but only Prometheus is thought to function as a ring shepherd. A ring system is a disc or ring orbiting an astronomical object that is composed of solid material such as dust and moonlets, and is a common component of satellite systems around giant planets. A ring system around a planet is also known as a planetary ring system. The most prominent and most famous planetary rings in the Solar System are those around Saturn, but the other three giant planets also have ring systems. Recent evidence suggests that ring systems may also be found around other types