What obstacles does this sea turtle face once it is in the ocean?

sea turtles face a lot of death obstacles in their survival. Usually like marine turtles and also in a different case sharks as well are captured.

Explanation: they are like accidentally  captured in fisheries. Trash or plastic that is in the oceans can harm very much of the turtles. the oil spills and pollution

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explanation:

the mantle

explanation:

earth is divided into three layers: the crust or the outermost layer on which we live; the underlying, middle layer - the mantle - and the core (the innermost layer of earth).