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Opercular series in bony fish: operculum (yellow), preoperculum (red), interoperculum (green) and suboperculum (pink) The operculum is a series of bones found in bony fish and chimaeras that serves as a facial support structure and a protective covering for the gills ; it is also used for respiration and feeding.
The preoperculum has a sizeable spine at its corner and a serrated rear margin while there are 4 spines between the preoperculum and the operculum. [3] The juveniles are a dark bluish-grey on their bodies, which is marked with a number of vertical blue bars, 2 on the head and 5 on the flanks, these fade as they mature into adults. [ 4 ]
The lower edge of the preoperculum is serrated with a strong spine at its angle; the operculum has a small spine and a serrated flap above the origin of the lateral line. Its scales are ctenoid. [9] In cross section, the fish is compressed and the dorsal head profile clearly concave.
The Ocean Photographer of the Year awards announced the winners of its 2024 contest featuring stunning images of underwater wildlife. 12 award-winning underwater photos give rare glimpses beneath ...
Ogcocephalus vespertilio was first formally described as Lophius vespsertilio by Carl Linnaeus in the 10th edition of Systema Naturae with its type locality given as the "American Ocean". [3] In 1813 Gotthelf Fischer von Waldheim proposed the genus Ogcocephalus and in 1896 David Starr Jordan and Barton Warren Evermann descignated Linnaeus's L ...
Turbinella pyrum, common names the chank shell, sacred chank or chank, also known as the divine conch or referred to simply as a conch, is a species of very large sea snail with a gill and an operculum, a marine gastropod mollusk in the family Turbinellidae. This species occurs in the Indian Ocean.
Common periwinkles are native to the northeastern coasts of the Atlantic Ocean, including northern Spain, France, Great Britain, Ireland, Scandinavia, and Russia. [ 9 ] There have been more than 14,000 observations made available as a dataset at the Global Biodiversity Information Facility - Littorina littorea , [ 12 ] which can be explored.
The color of the body is bluish-gray on the upper body becoming yellow or golden on the lower body. In young fishes there is a series of dark bars run diagonally from the back to the middle of the flanks, these fade as the fish ages. There is a large black spot on the body above the upper margin of the operculum. [8]