Dimethyl Sulfide is the "climate cooling gas"  and “universal marine infochemical” found in Dr Juice Kairomone Fish Scent

An oceanic phytoplankton bloom in the South Atlantic Ocean, off the coast of Argentina covering an area about 300 by 50 miles (500 by 80 km)

Artificial fertilization of the ocean has been proposed as a possible geoengineering method for removing carbon dioxide from the atmosphere by stimulating zooplankton growth.  Iron is the "limiting nutrient" for them. If fed iron, they bloom, but can produce toxic red tide and other toxins.  International law might prevent, "ocean dumping".  Will it produce drought in Europe?  How far do we go to combat "climate change"?

https://wikivisually.com/wiki/Iron_fertilization

Scientists discover key gene for producing marine molecule with huge environmental impacts

https://phys.org/news/2018-02-scientists-key-gene-marine-molecule.html

Gas Smelling Drone Helps Monitor Ocean

https://dronebelow.com/2018/07/26/gas-smelling-drone-helps-monitor-ocean/

DMS s released when zooplankton and shrimp type crustaceans eat phytoplankton and algae. As it travels up in the atmosphere, it acts as a sulfur nuclei for cloud formation, cooling the waters and slowing algae  growth, reducing the subsequent formation of DMS, allowing more sun to heat the water, and again spur algae growth.  It's a "negative feedback loop", purported to keep the climate in homeostasis and from warming.  It's called the CLAW Hypothesis.  This is great for the earth, but for fishermen and other predators it signifies where the food web is most active and is the scent associated with EATING.