Sea pollution is caused by a long list of contributing factors such as:
Chemicals – directly via sewage which flows into the sea
and indirectly via polluted underground water:
Picture Credit to Queensland Government website, Oil and chemical pollution webpage.
Oil – from oil drilling rigs and tankers catastrophes:
Picture Credit to Mirror UK website, Dolphins and turtles at risk from oil spill off Canary Islands holiday beached webpage.
Radioactive waste – nuclear waste dropped into the sea:
Picture Credit to BBC news website, Nuclear waste needs good home webpage.
Sewage, Plastic pollution and more:
Picture Credit to INDEPENDENT website, Scientist warns we could be berthing in microplastic particles laden with chemicals webpage.
This question is focused on the effect of plastic sheets and bags on fishes and other sea creatures:
Picture Credit to coolerlifestyle website.
Video credit according to Standard YouTube License - Education category
Water flow and plastics bags interaction and effect on drainage pipe demonstration (Authentic video, created by the question producers )
What is the most immediate and likely damage that plastic bags pollution at sea may cause?