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Why would a fish that lives in the bathypelagic zone lack a swim bladder, and what adaptations would help it maintain neutral buoyancy?

A. Intertidal zone
B. Epipelagic zone
C. Bathypelagic zone
D. Mesopelagic zone

Answer :

Answer:

d

Explanation:

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Rewritten by : Barada

Final answer:

Fish in the bathypelagic zone lack swim bladders due to high pressure, but have other adaptations for buoyancy.

Explanation:

A fish that lives in the bathypelagic zone lacks a swim bladder because the high pressure in this deep-sea zone compresses gas-filled structures, making them ineffective. To maintain neutral buoyancy, these fish have evolved other adaptations such as a large oily liver or low-density flesh. For example, the black dragonfish has a large liver that is filled with oil. This oil is less dense than water, allowing the fish to float. Additionally, the flesh of these deep-sea fish is often less dense, which helps them maintain neutral buoyancy in the bathypelagic zone. Other adaptations include reduced body size, streamlined body shape, and reduced skeletal mass.

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