This aerial photograph taken on Sunday in Turkey's Marmara Sea at a harbour on the shoreline of Istanbul shows mucilage, a jelly-like layer of slime that develops on the surface of the water due to the excessive proliferation of phytoplankton, which is gravely threatening the marine biome.
The mucilage has been informally referred to as "sea snot" and was first documented in Turkey's waters in 2007. Experts warn the mucilage will occur more often because of global warming.
SEND US YOUR PICTURE
Do you have a Big Picture to share with us? The image should be a recent one, with minimal digital enhancement. Send it to firstname.lastname@example.org with the title BIGPIC followed by a description of your photo. Images should be in jpg format and no more than 2MB in size.
We have been experiencing some problems with subscriber log-ins and apologise for the inconvenience caused. Until we resolve the issues, subscribers need not log in to access ST Digital articles. But a log-in is still required for our PDFs.