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;...

some birds Operculum (bryozoa), a lid on the orifice of some bryozoans Operculum (fish), a flap covering the gills of bony fish Operculum (gastropod)...

branchial pouches. Fish gill respiration Fish gill structure In bony fish, the gills lie in a branchial chamber covered by a bony operculum (branchia is an...

operculum lies on the top rear part of the foot. When the foot is retracted, the operculum is rotated 180° and closes the shell. An operculum (fish)...

protective bony cover or operculum. They are able to oxygenate their gills using muscles in the head. Some 400 species of fish in 50 families can breathe...

Common names of fish can refer to a single species; to an entire group of species, such as a genus or family; or to multiple unrelated species or groups...

Juvenile fish Fish go through various life stages between fertilization and adulthood. The life of fish start as spawned eggs which hatch into immotile...

(/ˌɒstiːˈɪkθi.iːz/), also known as osteichthyans or commonly referred to as the bony fish, is a diverse superclass of vertebrate animals that have endoskeletons primarily...

Deep-sea fish are fish that live in the darkness below the sunlit surface waters, that is below the epipelagic or photic zone of the sea. The lanternfish...

Fish migration is mass relocation by fish from one area or body of water to another. Many types of fish migrate on a regular basis, on time scales ranging...