What is a SURFACE CURRENT?
It's the movement of the sea's surface water in a constant direction.
What is PREVAILING WIND?
It's the direction from which the wind nearly always blows in a particular area.
What is PHYTOPLANKTON?
Small organisms in the sea that can make their own food and upon which almost all other sea creatures depend for their food.
What are LIMITING FACTORS?
Of all the factors that might affect a process, the one that is in shortest supply.
What is a EUPHOTIC ZONE?
The top 200 metres or so of seawater through which light can penetrate and which photosynthesis can happen.
What is an UPWELLING?
It's an area where minerals at the ocean floor are brought to the surface by currents.
What is OVER FISHING?
It's when the number of fish that are caught is greater than the rate at which the fish reproduce, leading to a fall in fish numbers in an area.
What is E.N.S.O.?
EL NINO SOUTHERN OSCILLATION; the change in prevailing winds that leads to a change in the pattern of currents in the oceans of the south Pacific.
What is BYCATCH?
Unwanted animals that are caught by fishers.