Question

81. Petromyzon is
(A) ectoparasite
(B) endoparasite
(C) Both
(D) None​

Answer 1

Answer:

Ectoparasite

Explanation:

The sea lamprey Petromyzon marinus, which is among the most phylogenetically ancient vertebrates, is a hematophagous ectoparasite that feeds on vertebrates and is considered vulnerable in Europe but is a pest in the North American Great Lakes

Answer 2

Option A is the correct answer

Petromyzon is the parasitic lamprey found in the northern Atlantic Ocean along shores of Europe and North America. Anadromous fishes migrate from the sea up into the freshwater to spawn or stay entirely in freshwater and migrate upstream to spawn. Petromyzon is one such fish.