| 1. | They are not generally found at abyssopelagic or hadopelagic depths or on the abyssal plain.
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| 2. | Abyssopelagic zone : 4000m-6000m 5.
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| 3. | Abyssopelagic zone : 4000m-6000m5.
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| 4. | The bathypelagic and abyssopelagic zones are aphotic, meaning that no light penetrates this area of the ocean.
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| 5. | Zones which vary according to their depth include the epipelagic, mesopelagic, bathypelagic, abyssopelagic, and hadopelagic zones.
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| 6. | Deep-sea organisms generally inhabit bathypelagic ( 1000 4000m deep ) and abyssopelagic ( 4000 6000m deep ) zones.
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| 7. | If the water is exceptionally deep, the pelagic zone below 4000 metres is sometimes called the "'lower midnight "'or abyssopelagic zone.
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| 8. | If the water is exceptionally deep, the pelagic zone below 4000 m is sometimes called the "'lower midnight "'or abyssopelagic zone.
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