among red , green and brown algae which is more likely to be found in deep sea?

red colour algae is found in deepest ocean.

reason: algae especially red algae are found in the deepest regions of the ocean. red color of these is due to phycoerythrin which absorbs green light. this has short wavelength and hence high energy. so these wavelengths are able to reach the deepest region of sea. so they are able to survive in these deep regions by utilising the green region of spectrum where most of the plants fail(because they reflect green light)