They are drifting and changing shape. I hope it's not an oil spill.
Update: Thanks to Roxanne who has read in Kuwait Times that it is algal (new word for me) bloom.
Algal Bloom according to Wiki [link].
harmful algal blooms (HABs), which are algal bloom events involving toxic or otherwise harmful phytoplankton such as dinoflagellates of the genus Alexandrium and Karenia, or diatoms of the genus Pseudo-nitzschia. Such blooms often take on a red or brown hue and are known colloquially as red tides.
Let's hope this doesn't contaminate the sea life, fish and shrimp. Little worrying!