What are the characteristics of a cartilaginous fish?

They generally possess the following characteristics:

• 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.
• The position of their tail finds is heterocercal.

What kind of skin do cartilaginous fish have?

placoid scales
A cartilaginous fish’s skin is covered in placoid scales, or dermal denticles, tooth-like scales different from the flat scales (called ganoid, ctenoid or cycloid) found on bony fish.

What are fish characterized by?

One of the six basic animal groups, fish are aquatic vertebrates that have skin that is covered with scales. They also feature two sets of paired fins, several unpaired fins, and a set of gills. Other basic animal groups include amphibians, birds, invertebrates, mammals, and reptiles.

What are 3 examples of cartilaginous fish?

3 Cartilaginous Fish Eggs. 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).

What is difference between bony fish and cartilaginous fish?

What is the difference between bony and cartilaginous fish? Cartilaginous fishes have skeletons composed mostly of cartilage while bony fish have a skeleton composed mostly of bone.

Why are sharks cartilaginous fish?

Cartilaginous skeleton Sharks, rays, skates, and chimaeras (also know as rat fishes) all have cartilaginous skeletons. Cartilage is less dense than bone, allowing sharks to move quickly through the water without using too much energy.

What are three characteristics of a fish?

5 Characteristics That All Fish Have in Common

• All Fish Are Cold-Blooded. All fish are cold-blooded, which is also called ectothermic.
• Water Habitat. Another shared characteristic amongst all fish is that they live in water.
• Gills to Breathe.
• Swim Bladders.
• Fins for Movement.

What are the 3 categories of fish?

Fishes are typically divided into three groups: superclass Agnatha (jawless fishes), class Chondrichthyes (cartilaginous fishes), and superclass Osteichthyes (bony fishes).

What are 2 examples of cartilaginous fish?

What is another name for cartilaginous fish?

chondrichthyes
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).

What are three examples of cartilaginous fish?

Which fish does not have bones?

Sharks
Sharks don’t have bones. They are a special type of fish known as “elasmobranch,” which translates into fish made of cartilaginous tissues – the clear gristly stuff that your ears and nose tip are made of. This category also includes rays, sawfish, and skates.

What kind of fish have cartilagenous skeletons?

Chondrichthyes includes all jawed fish with cartilagenous skeletons, such as sharks, rays, skates, and chimaeras. Osteichthyes includes all jawed fish with ossified (bony) skeletons; this includes the majority of modern fish. Osteichthyes can be further separated into Actinopterygii (the ray-finned fishes) and Sarcopterygii (lobe-finned fishes).

How are Scales protect the skin of cartilaginous fishes?

Scales protect skin Edit title. The skin of cartilaginous fish is protected by a covering of abrasive placoid scales, called denticles. Click/tap images for attribution and license information.

What kind of fish has bony plates in its skin?

A few modern teleosts (some catfishes, sticklebacks, and others) have secondarily acquired bony plates in the skin.

What kind of skin does a catfish have?

Modern teleost fishes have scales of bone, which, while still protective, allow much more freedom of motion in the body. A few modern teleosts (some catfishes, sticklebacks, and others) have secondarily acquired bony plates in the skin.