Algae blooms?
Perhaps a mucilaginous aggregate event in the waters near the Cape of St. Vincent. It was definitely not upwelling sediment; the masses stayed intact and did not disperse, but moved around in the ocean waves.
Eastern Atlantic Ocean Algarve Sagres| Author(s) | Jane Hawkey | 
| Author Company | Integration and Application Network | 
| Date Created | 2006-05-10 | 
| Album | Flora > Microalgae | 
| Type | Photo | 
| Dimensions | 2816 x 2112 | 
| Filesize | 2.9 MB | 
| Number of Downloads | 354 | 
| Filetype(s) | JPG | 
| License | Attribution-ShareAlike 4.0 International (CC BY-SA 4.0) | 
| Required Attribution | Jane Hawkey, Integration and Application Network (ian.umces.edu/media-library) |