What would happen to aquatic organisms if solid water were denser than
liquid water?

Let's say it's below the freezing temperature of water. Well what would happen is the water up here would freeze. And this is actually what does happen. Water at the surface would freeze, but if this ice were more dense, the solid water were more dense than the liquid water, well then the ice would sink.

Explanation:

answer; the tunica intima also called tunica interna, consists of elastic fibers,connective tissue and smooth muscle cells;

that would be called plucking : )

explanation:

''plucking, also referred to as quarrying, is a glacial phenomenon that is responsible for the erosion and transportation of individual pieces of bedrock, especially large "joint blocks". as a glacier moves down a valley, friction causes the basal ice of the glacier to melt and infiltrate joints (cracks) in the bedrock."