they have adapted to have light from their heads
yes
It limits what animals can live there.
they use chemicals to produce light. this is know as bio-lumenesence
There are positive and negative effects we have on the abyssal zone. Some negative effects are we have poluted the abyssal zone. We can't get down far enough to clean the abyssal zone. Some positive effects we have on the abyssal zone are reasearching the animals down in the abyssal zone and we can find out if they could live in shallower water of it they have to live in deep water.
The abyssal zone
The abyssal zone is the region of the deep ocean that is just above and on the ocean floor.
Echinoderms are marine animals, which means they reside in the ocean. Echinoderms are found from the intertidal zone to the abyssal zone.
in the abyssal zone
Plants need light to grow, in the abyssal/hadal zone, there is no light.
abyssal zone
no
The midnight zone and the abyssal zone