Which one is a cartilaginous fish with an operculum (gill cover)?
A cartilaginous fish with an operculum (gill cover) is Chimaera. So, the correct answer is 'Chimaera'. Was this answer helpful?
What is the difference between cartilaginous and bony fish?
Unlike bony fish, the cartilaginous fish do not have a swim bladder, so must move continuously or else they will sink. One characteristic unique to cartilaginous fishes is the ampullae of Lorenzini.
What is the function of the operculum in fish?
The operculum is a series of bones found in bony fish that serves as a facial support structure and a protective covering for the gills; it is also used for respiration and feeding. 1 Anatomy.
What is the function of the opercular series in bony fish?
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.
Is operculum absent in cartilaginous fish?
The operculum is a bony flap covering the gills in bony fishes. It regulates the direction of water flow over the gills. It is not found in cartilage fishes. Whereas scales, gill slits and pelvic fins are found in both the fishes, bony and cartilaginous.
Which type of fish has operculum?
bony fishOperculum is present in bony fish, hence forms gill covering for bony fish. Operculum is series of bones. It provides facial structure to bony fish.
Which type of fish do not have operculum?
Sharks, rays and relatives such as elasmobranch fishes lack the opercular series. They instead respire through a series of gill slits that perforate the body wall. Without the operculum bone, other methods of getting water to the gills are required, such as ram ventilation, as used by many sharks.
What is absent in cartilaginous fishes?
The correct option is C Pristis. Operculum (gill cover) is present in bony fishes and absent in cartilaginous fishes. Pristis is a cartilaginous fish and it lacks an operculum.
What groups have an operculum?
The operculum is a large flap consisting of several flat bones that covers and protects the gills, and which is found throughout the actinopterygians. Within extant sarcopterygians, however, it is found in coelacanths and lungfish but not in tetrapods.
Is operculum present in Chondrichthyes?
In cartilaginous fishes, gill slits are separate and without operculum (gill cover). Bony fishes possess gill slits that are covered by an operculum.
What are the difference between cartilaginous fishes and bony fishes?
Cartilaginous fishes have skeletons composed mostly of cartilage while bony fish have a skeleton composed mostly of bone. Furthermore, these two types of fish fall under different taxonomic groups – Cartilaginous fish are grouped under the class Chondrichthyes and all bony fish fall under the superclass Osteichthyes.
What are the characteristics of cartilaginous fish?
Cartilaginous FishPaired fins.Paired nostrils.Scales.Two-chambered hearts.Skeletons made of cartilage rather than bone. Cartilage is supportive tissue that does not have as much calcium as bones, which makes bones rigid. Cartilage is softer and more flexible than bone.
Do cartilaginous fish have gill slits?
In addition to the difference in their skeletons, cartilaginous fish have gills that open to the ocean through slits, rather than the bony covering that is present in bony fish. Different shark species may have different numbers of gill slits. Cartilaginous fish may also breathe through spiracles, rather than gills.
What structures are evident in bony fish but are lacking in cartilaginous fish?
Bony fishes also contain a structure called operculum that is absent in cartilaginous fishes.
Do whales operculum?
This pupil shape is characteristic of many dolphins and whales, although in several whales the operculum is small. A known exception is the Amazon river dolphin which has a round pupil even when it is constricted.
Which of the following is a cartilaginous fish?
Cartilaginous fishes (chondrichthyes) represent the oldest surviving jawed vertebrates and, as the name suggests, have a skeleton made out of cartilage. They include sharks, rays, and skates (elasmobranchii) and chimeras (holocephali).
Do sharks have operculum?
Members of the class Chondricthyes, including sharks, skates and rays, have skeletons made of cartilage, and therefore do not have a bony operculum. Instead, they have 5-7 exposed gill slits.
What is operculum in fish made of?
four bonesOperculum in Fish The operculum is a plate-like covering that is made up of four bones: the opercle, the preopercle, the interopercle, and the subopercle. The operculum protects the gills and aids in breathing.
What is opercular gill in fish?
The operculum is a hard, plate-like, bony flap that covers the gills of a bony fish (superclass: Osteichthyes). It protects the gills and also serves a role respiration. Fish can acquire dissolved oxygen through pumping water over their gills by opening and closing their jaws and opercula.
Why do some fish have operculum to cover their gills?
The operculum is a bony flap of skin over their gills that protects the gills. It opens and closes to help bony fish breathe when they are not swimming. Bony fish have scales, and most species have a fusiform body design.
What is the operculum in fish?
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.
What genes are involved in the development of the operculum bone?
Genes that are essential in the development of the opercular series is the Eda and Pitx1 genes. These genes are known to be a part of the development and loss of armor plates in gnathostomes.
What are the four bones in the opercular series?
Anatomy. The opercular series contains four bone segments known as the preoperculum, suboperculum, interoperculum and operculum. The preoperculum is a crescent-shaped structure that has a series of ridges directed posterodorsally to the organisms canal pores. The preoperculum can be located through an exposed condyle that is present immediately ...
How do fish get oxygen?
The opercular series is vital in obtaining oxygen. They open as the mouth closes, causing the pressure inside the fish to drop. Water then flows towards the lower pressure across the fish's gill lamellae, allowing some oxygen to be absorbed from the water. In cartilaginous ratfishes, they present soft and flexible opercular flaps. Sharks, rays and relatives such as elasmobranch fishes lack the opercular series. They instead respire through a series of gill slits that perforate the body wall. Without the operculum bone, other methods of getting water to the gills are required, such as ram ventilation, as used by many sharks.
Where is the suboperculum located?
The suboperculum is rectangular in shape in most bony fishy and is located ventral to the preoperculum and operculum components. It is the thinnest bone segment out of the opercular series and is located directly above the gills. The interoperculum is triangular shaped and borders the suboperculum posterodorsally and the preoperculum anterodorsally.
Do sharks have operculums?
Sharks, rays and relatives such as elasmobranch fishes lack the opercular series. They instead respire through a series of gill slits that perforate the body wall. Without the operculum bone, other methods of getting water to the gills are required, such as ram ventilation, as used by many sharks.
What is the name of the fish that discharges electricity?
B. Chimaera, known as rabbit fish, is found in deep sea. C. Torpedo , known as electric ray, is a bottom living marine fish which is famous for discharging electricity. D. Trygon, known as sting ray, resembles electric ray but it is devoid of electric organs.
Where is Scoliodon found?
A. Scoliodon, known as Dog fish, is found in Bay of Bengal.
