Question

Lateral line sensory organs are mainly characteristic of:
A. Amphibians
B. Aquatic birds
C. Fishes
D. Aquatic mammals

Answer 1

Hint: Lateral line system is also called ‘Lateralis system’. This helps to detect the movements and pressure gradients change in the surrounding water.

Complete answer:
The lateral line is generally a hydrostatic receptor system that helps aquatic organisms like fishes to detect the very little or minute water currents or motions which are produced by the conspecifics, predators or prey. The lateral lines have sensory units which are neuromasts that are released over the large portion of the surface of the body.
With the help of the lateral line system, fishes measure the relative movements between the surrounding water and their body.
Using the lateral line sensory systems, fishes perceive water movements of both biotic and abiotic origin. Fishes live in a habitat which is wide-ranged with highly diverse hydrodynamic conditions starting from pools, lakes, ponds then to high current sea areas.
Fishes are aquatic animals having greater diversity. There are over 32,000 species total estimated for the fishes. Due to this, they are considered as the largest group of vertebrates. Sense organs are the key organ in most of the fishes but not in all.

Hence, the correct answer is option (C). Fishes

Note:
Fishes are considered to have a good sense of smell. The lateral line system is a system of tactile sense organs located in the head and also along both the sides of the body. Even when the fishes are blinded, they can sense the movements produced by the prey.
Sharks and rays have neuromasts which have gone under some interesting evolution.