Ostorhinchus capricornis Ostorhinchus capricornis Ostorhinchus capricornis, also known as the Capricorn cardinalfish, is a species of ray-finned fish, a cardinalfish from the family Apogonidae which occurs around reefs in the western Pacific Ocean. "Ostorhinchus capricornis" is dusky yellow in colour, this lightens to bronze or golden yellow on the ventral surfave. It has a black spot around the caudal peduncle and it has two "neon" blue stripes which run through the eye, the lower stripe extending to the posterior edge of the operculum. It grows to a maximum standard length of . It is similar to the yellow cardinalfish ("Ostorhinchus flavus") but
Operculum (gastropod) ornaments. The largest opercula of "Turbo marmoratus" have been used as paperweights. Operculum (gastropod) The operculum, meaning little lid, (plural: opercula or operculums) is a corneous or calcareous anatomical structure like a trapdoor which exists in many (but not all) groups of sea snails and freshwater snails, and also in a few groups of land snails; the structure is found in some marine and freshwater gastropods, and in a minority of terrestrial gastropods, including the families Helicinidae, Cyclophoridae, Aciculidae, Maizaniidae, Pomatiidae, etc. The operculum is attached to the upper surface of the foot and in its most complete state, it