opercular gills are found in the class osteichye "bonny fish" who have a operculum. Septal gills are found in chondritchthyes "cartilagenous fish"
No, there is no difference.
The difference between the major phyla of vertebrates include chordates possess a hollow dorsal nerve tube, flexible rod-like axial skeletal structure, have gill slits or pharyngeal clefts and a tail
The gill rakers on fish keep food particles from moving out from in between the gill arches. For filter feeding fish and some suspension feeding fish, the gill rakers function is to trap the food.
They can only be sexed by observation during breeding season. At that time the males develop whitish spots on their gill plates and pectoral fins.
a gill cover is used to cover the gill on the fish
If you are refering to a "Fancy tailed" goldfish. They only show a physical difference when they are in spawning condition (Springtime). At that time the male develops white spots on his gill plates (and sometimes his pectoral fins). The female develops a chubby tummy.
Sharks do not have lungs, but have between five and seven gill openings.
A bilateral gill trama is a type of gill trama, the internal flesh of a mushroom's gill, which has a central strand of hyphae.
A gill.
Thea Gill's birth name is Thea Louise Gill.
Ari Gill's birth name is Arinder Singh Gill.
Casey Gill's birth name is Casey Elizabeth Gill.