Question

•What would be the most likely reason organisms in the abyss would have an unhinged jaw?

Answer 1

Well it makes it way easier to swallow\eat prey.

Answer 2

•What would be the most likely reason organisms in the abyss would not have any eyes?

Answer 3

For example a snake or a dog

Answer 4

•How do organisms obtain their food if there is no sunlight for photosynthesis?

Answer 5

They have eyes to capture light and in the abyss there is no light n for the fish to recognize their environment, so they do not have eyes because they have evolved to not need them