Question

Which of the following is a fresh water cartilaginous fish? a) Scoliodon (dog fish) b) Trygon (sting ray) c) Torpedo (electric ray) d) None of these

Answer 1

Answer:

The torpedo is a marine cartilaginous fish.

A marine fish called a torpedo is cartilaginous. It uses specific muscles to generate current. It also goes by the name of electric ray.

Explanation:

Torpedo:

These fish can have both marine and freshwater environments. They are often found in rivers or locations where rivers meet the sea, deep ocean trenches, tropical coral reefs, and rivers (estuaries). Cartilaginous fish are creatures with cartilage skeletons; they are members of the class Chondrichthyes.

This little torpedo has two tiny dorsal fins placed back on its muscular tail, close to its triangular caudal (tail) fin, an oval pectoral disc with a straight edge at the front an elongated body with rounded pelvic fins. It has five dark blue dots surrounded by dark and light accents. It is white below and reddish brown on top.

Fish classified as cartilaginous have a cartilage-based skeleton compared to a bone-based one. Fish with cartilage are all sharks, skates, and rays, including the southern stingray. These fish are all members of the elasmobranch fish family.

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Answer 2

d) None of these is a freshwater cartilaginous fish.

Cartilaginous fish:

• The class of cartilaginous fishes known as chondrichthyes includes these fishes, which have skeletons predominantly made of cartilage.
• They can be compared to Osteichthyes, also known as bony fishes, whose skeletons are primarily made of bone tissue.
• The earliest jawed vertebrates still alive are cartilaginous fishes (Chondrichthyes), which, as their name implies, have a cartilage-based structure.
• Sharks, rays, skates (Elasmobranchii), and chimeras are among them (Holocephali).
• Jawed fish having pairs of fins, pairs of nostrils, scales, two-chambered hearts, and skeletons comprised of cartilage as opposed to bone are known as cartilaginous fish.
• Sharks, rays, and skates are some examples of cartilaginous fish.

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