Small size. Large mouths. Expandable stomachs. Black coloration. Flabby muscules. Lack of a swim bladder.
The three common **adaptations **in the deep pelagic realm may significantly include numerous nekton , followed by cephalopods, black coloration, the **small **appearance of mouths, lack of swimming ability, etc.
What is Adaptation?
**Adaptation **may be characterized as a type of **mechanism **that typically involves an act of **modification **of an organism or its parts that makes it more fit for existence and survival . It is passed or inherited from generation to generation.
According to the context of this question, **Fishes **are the most biodiverse in this region or **realm **along with marine reptiles, marine mammals, and some crustaceans. They all have some sort of common **adaptation **pattern in order to **facilitate **their survival.
Therefore, the three common **adaptations **in the deep pelagic realm may be well-described above.
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In the deep pelagic realm, common adaptations include bioluminescence for attracting prey or communication, large eyes for detecting light and movement, and flexible bodies to cope with high pressures. These adaptations are essential for survival in the dark and extreme conditions of the deep sea.
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