Problem 188 - Objective Biology for NEET

Question

Which of the following is a fresh water bony fish? (a) Labeo (rohu) (b) Catla (katla) (c) Clarias (magur) (d) All of these

Step-by-Step Solution

Answer

The correct answer is (d) All of these. All the mentioned fish, Labeo (rohu), Catla (katla), and Clarias (magur) are fresh water bony fish.

Step 1: Identify Labeo

Labeo, also known as Rohu, is a species of fish in the carp family. It is a freshwater fish that is commonly found in rivers and lakes in South Asia.

Step 2: Identify Catla

Catla, also known as Katla, is a species of Indian carp. Like Rohu, it is a freshwater fish that is popular in aquaculture in South Asia.

Step 3: Identify Clarias

Clarias, commonly known as Magur, is a genus of catfishes. They are generally freshwater fishes and are found in a wide variety of habitats.

Key Concepts

Labeo

Labeo, commonly known as Rohu, is a significant freshwater fish in South Asia. It belongs to the carp family and is an essential species in the aquaculture industry. Labeo is typically found in rivers and lakes, thriving in the warm waters of the Indian subcontinent.

These fish are known for their unique body streamlined for efficient swimming and their silvery scales that give them a distinctive appearance.

Rohu fish play a crucial role in food security and economic support in rural areas through fish farming, providing a high source of protein. It is a highly adaptive species, able to flourish in various water conditions, although they prefer slightly alkaline freshwater environments.

• Typically resides in freshwater habitats.
• Widely consumed especially in South Asia.
• Part of the popular "Indian major carps" culture in fish farming.

Catla

Catla, also referred to as Katla, is another prominent freshwater fish from the carp family. Sharing many habitats with Labeo, Catla is native to the rivers and lakes of South Asia and is famed for its distinctly large head and big mouth.

As a herbivorous fish, it feeds predominantly on phytoplankton and requires clean water with ample natural food supply. Katla is highly appreciated in local cuisines due to its succulent flesh and mild taste.

In aquaculture, Catla forms an integral part of polyculture practices, where it is bred alongside other carp fish like Rohu for increased productivity. Its rapid growth rate and adaptability to varied water environments make it a favorite among fish farmers.

• Rich source of protein and omega-3 fatty acids.
• Known for its large size, contributing significantly to commercial fish yields.
• Bred extensively in South Asian aquaculture systems.

Clarias

Clarias, commonly known as Magur, belongs to a different group of freshwater fishes, referred to as catfishes. Distinguished by their elongated body and prominent barbels resembling whiskers, Clarias species are quite unique in their appearance.

These fish are highly versatile and can endure a wide range of environmental conditions, ranging from clean water bodies to habitats with low oxygen content, thanks to their specialized breathing apparatus.

They thrive in ponds, swamps, and even muddy waters, often found in the wetlands of tropical regions. Clarias are considered an essential part of traditional diets in various cultures, offering rich nutritional benefits.

• Adaptable to various harsh environments.
• Possesses an accessory breathing organ enabling survival in low-oxygen waters.
• Includes species such as Clarias batrachus often seen in rural aquaculture practices.