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Q114
(CDS-I/2003)
Environment & Ecology › Biodiversity & Protected Areas › Marine conservation
Answer Verified
Which among the following is the predominantly deep-sea animal?
Result
Your answer:
—
·
Correct:
C
Explanation
The correct answer is Option 3. While all the listed animals are found in marine environments, Whales are classified as predominantly deep-sea animals due to their extraordinary physiological adaptations for deep-diving.
- Whales: Certain species, like the Sperm Whale and Cuvier’s Beaked Whale, are renowned for diving to depths exceeding 2,000–3,000 meters to hunt. They possess specialized lungs and high concentrations of myoglobin to store oxygen, allowing them to remain in the deep ocean for extended periods.
- Dolphins and Turtles: These are generally surface-dwellers or inhabit shallower coastal waters. While they can dive, they do not spend the majority of their life cycle or hunting time in the deep-sea (bathyal or abyssal) zones.
- Fish: The term is too broad. While deep-sea fish exist, the vast majority of fish biomass is concentrated in the sunlit epipelagic zone (top 200m).
Therefore, in the context of deep-sea navigation and survival, whales represent the most significant group of deep-diving mammals.
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