The effects of pollution on account of marine debris (plastic or glass objects, bags, cigarette butts, etc.) on animals are increasingly becoming of concern.

Many cetaceans confuse waste with their usual prey, and since they cannot digest them, they die of starvation or suffocate. There is also the question of the toxicity of small waste in the form of small plastic pellets that contain toxic substances to which the cetaceans are very sensitive.

Marine debris also includes fishing lines, abandoned nets, etc. Cetaceans get entangled in them. Many drown. Those who survive often fail to get rid of these wires that hinder their movement and prevent them from feeding properly. These wires cut into their flesh and can partially cut the bone. The animal eventually starves or succumbs to the infection of his wounds.