Question

Identify the exotic fishes to India
A) Ctenopharyngodon idella and Oncorhynchus mykiss
B) Esomus danricus and Cirrhinus cirrhosus
C) Poecilia reticulata and Cyprinus carpio
D) Lates niloticus and Betta splendens

• A. (A), (B) and (D) only
• B. (A), (C) and (D) only
• C. (A), (B), (C) and (D)
• D. (B), (C) and (D) only

Hint:

When answering grouping questions, identify the indigenous species first.
Here, knowing that Esomus danricus is a native Indian minnow helps you eliminate any option containing (B).

Answer 1

The Correct Option is B

Step 1: Understanding the Concept:
Exotic fishes are species that are non-native to a region and have been introduced from other countries for aquaculture, biological pest control, or ornamental purposes.

Step 2: Detailed Explanation:
Let us classify the fish species grouped in each statement:
- A) Ctenopharyngodon idella and Oncorhynchus mykiss: Grass carp (Ctenopharyngodon idella, native to China) and Rainbow trout (Oncorhynchus mykiss, native to North America) are exotic species in India. This statement is true.
- B) Esomus danricus and Cirrhinus cirrhosus: Flying barb (Esomus danricus) and Cauvery white carp (Cirrhinus cirrhosus) are indigenous to Indian freshwater systems. This statement is false.
- C) Poecilia reticulata and Cyprinus carpio: Guppy (Poecilia reticulata, native to South America) and Common carp (Cyprinus carpio, native to Eurasia) are exotic species in India. This statement is true.
- D) Lates niloticus and Betta splendens: Nile perch (Lates niloticus, native to Africa) and Siamese fighting fish (Betta splendens, native to Southeast Asia) are exotic species in India. This statement is true.
Since groups A, C, and D contain only exotic fish species, the correct option is (A), (C), and (D) only.

Step 3: Final Answer:
The groups containing exotic species to India are (A), (C), and (D) only.