Question

Which of the following fish have an electric organ?
A. Pristis
B. Torpedo
C. Scoliodon
D. Rhincodon

Answer 1

Hint: Chondrichthyes is a class that contains the cartilaginous fishes: they are jawed vertebrates with paired fins, paired nares, scales, a heart with its chambers in series, and skeletons made of cartilage. An electric organ is seen in the class of chondrichthyes.

Complete answer:
Now, let us analyze each and every option to find the correct answer.

Option A: Pristis or Sawfish have a strong shark-like body, a flat underside and a flat head. They do not have any electric organs. So, option A is incorrect.

Option B: Torpedoes are also known as electric ray. They have electric organs present that act as a defense mechanism against predators. So, option B is correct.

Option C: Scoliodon has an elongated, spindle-shaped body tapered at the ends, making it a very fast swimmer. It doesn't have any electric organs. So, option C is incorrect.

Option D: Rhincodon also known as the whale shark, the back and sides marked with a unique checkerboard pattern of light spots and transverse bars. But, they do not have any electric organ, so, option D is incorrect.

Hence, the correct answer is option (B)

Note: The electric rays are a group of rays, flattened cartilaginous fish with enlarged pectoral fins, composing the order Torpediniformes. They Are commonly known for their capability of producing an electric discharge, depending on species, used to stun prey and for defense.