2025 Animal KingdomClass Cyclostomata Easy Question 1 of 3 in Class Cyclostomata

All living members of the class Cyclostomata are:

A Free living
B Endoparasite
C Symbiotic
D Ectoparasite

The answer is D.

Solution

All living cyclostomes are ectoparasites on marine and freshwater fishes.

All living members of class Cyclostomata (e.g., Petromyzon and Myxine) are ectoparasites on fishes, using their circular, suctorial mouth without jaws to attach and feed on host body fluids.

Concept Cyclostome Characteristics

Class Cyclostomata in past papers

3 questions from this chapter have appeared across 3 exam years.