What side of the body do cartilaginous fish have in their mouths?

The mouth, nostrils and gill slits of skates and rays are always found on the underside of the fish, with the eyes and spiracles on the upper side. Many species also have spines and thorns on the upper surface and tail.

Do cartilaginous fish have a ventral mouth?

Their endoskeleton is primarily made of cartilage

Their exoskeleton is made of placoid (very small denticles coated with lots of sharp enamel) The buccal cavity of these fishes is ventrally positioned.

How do cartilaginous fish eat?

Cartilaginous fish are usually carnivorous animals that hunt smaller aquatic mammals for food. They bit into their prey and either swallow it whole or…

What is the position of mouth in Chondrichthyes?

Position of the Mouth

The mouth of Chondrichthyes is ventrally-located while the mouth of Osteichtheys is at the anterior tip of the body.

What makes cartilaginous fishes unique?

The cartilaginous fish are jawed fish with paired fins, paired nostrils, scales, two-chambered hearts, and skeletons made of cartilage rather than bone.

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Do cartilaginous fish have teeth?

Cartilaginous fish such as sharks, skates, and rays are vertebrates whose internal skeleton is made entirely of cartilage and contains no ossified bone. The tiny teeth that protrude from the skin vary in each species of shark. …

In which class of fishes mouth is located Ventrally?

A ventral mouth is typically found in cartilaginous fishes (Class Chondrichthyes). Scoliodon, commonly known as shark or dogfish, is a cartilaginous fish. Labeo and Catla are bony fishes (Class Osteichthyes), and Salamandra is an amphibian. Bony fishes have a terminal mouth.

Do cartilaginous fish have jaws?

Cartilaginous Fish

Cartilaginous fishes have a skeleton made of cartilage, a material that is lighter and more flexible than bone. These type of fishes have movable jaws that are usually armed with well developed teeth. The mouth is often located underneath the head.

Do cartilaginous fish have gills?

Cartilaginous means that the fish’s skeleton is not made of bones. … For most cartilaginous fish, they have five or more gill slits that open directly into the water. They rely on something called “ram ventilation” to push water through their gills.

Do cartilaginous fish have eyelids?

Sharks, skates, rays are prime example for living cartilaginous fish. There is no connection between their upper jaw and skull, so that they can move it independently. The skull comprises of 10 cartilaginous parts and they have eyelids to protect their eyes. Cartilaginous fish do not have ribs and no bone marrow.

Why do fish have different types of mouth position?

Fish have evolved to have different types of mouths depending on what their diet is and how they feed. The four different mouth types shown below are all designed to help fish catch their next meal most efficiently. Fish that have terminal or protrusible mouths generally feed on other fish.

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What order are sharks in?

Data Quality Indicators:

Superclass Chondrichthyes
Class Chondrichthyes – cartilaginous fishes, rays, sharks, condrictes, peixe cartilaginoso, tubarão, poissons cartilagineux, raies, requins
Subclass Elasmobranchii – cartilaginous fishes, rays, sharks, skates, torpedoes
Superorder Euselachii
Order Lamniformes – mackerel sharks

Which organ is absent in cartilaginous fish?

Chondrichthyes. Chondrichthyes Class of vertebrate animals characterized by a cartilaginous endoskeleton, a skin covered by placoid scales, the structure of their fin rays, and the absence of a bony operculum, lungs, and swim bladder.

Do cartilaginous fish have scales?

integumentary system in cartilaginous fish

Placoid scales (or denticles) are spiny, toothlike projections seen only in cartilaginous fishes. Ganoid scales, sometimes considered a modification of the placoid type, are chiefly bony but are covered with an enamel-like substance called ganoin.

Do cartilaginous fish have swim bladders?

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. If seen, the ampullae will look like small dots around the mouth or nose of a shark or ray.

Do osteichthyes have jaws?

Class Osteichthyes includes all bony fishes. Like all fishes, Osteichthyes are cold-blooded vertebrates that breathe through gills and use fins for swimming. Bony fishes share several distinguishing features: a skeleton of bone, scales, paired fins, one pair of gill openings, jaws, and paired nostrils.