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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.
Apolemichthys trimaculatus is a bright yellow species of angelfish which has blue lips, a wide black margin to the anal fin, a black spot on the forehead and a faint spot just to the rear of the operculum. The juveniles do not have the spots and show a thin black band running vertically through the eye and vertical golden barring on the flanks. [4]
An operculum (fish), a flap that covers the gills in bony fishes and chimaeras. The cover that rapidly opens a cnida of a cnidarian such as a jellyfish or a sea anemone. The lid may be a single hinged flap or three hinged flaps arranged like slices of pie. [1] [3] In insects, the operculum is the name for one or more lids covering the tympanal ...
This fish is a deep bluish-green on the dorsal surface and silvery along the flanks. The eyes are yellow and the pectoral and pelvic fins have reddish-yellow bases. The colouring becomes more vivid in the breeding season and males may have the operculum , base of the fins and the belly turn orange.
Fish gills are organs that allow fish to breathe underwater. Most fish exchange gases like oxygen and carbon dioxide using gills that are protected under gill covers (operculum) on both sides of the pharynx (throat). Gills are tissues that are like short threads, protein structures called filaments. These filaments have many functions including ...
Shell of marine snail Lunella torquata with the calcareous operculum in place Gastropod shell of the freshwater snail Viviparus contectus with corneous operculum in place. An operculum (Latin for 'cover, covering'; pl. opercula or operculums) is a corneous or calcareous anatomical structure like a trapdoor that exists in many (but not all) groups of sea snails and freshwater snails, and also ...
Albino paradise fish. Paradise fish are fairly combative, harassing and attacking each other, as well as potentially assaulting and killing small fish. During a fight, the paradise fish will often change its color, usually displaying dark blue lateral lines on the sides of their bodies; extend its fins; and spread out its operculum. [5]
Close to the operculum is a characteristic bright-yellow marking on a black background. It has a long fringed caudal fin, resembling an old broom (hence the common name) or the tail of a crowntail betta .