Jellyfish:
3D illustration background of jellyfish. Jellyfish swims in the ocean sea, light passes through the water, creating the effect of volume-rays. Dangerous blue jellyfish 
Moon jellyfish [Red Sea, Egypt] 
Under water swimming pool and ocean:
OLYMPUS DIGITAL CAMERA 
Plastic in the ocean:
Pool sinker:
FREYA GEORGE LAUVC602 