algae: a simple small non-flowering aquatic plant

biodiversity: the variety of living organisms found over the world or in a particular habitat or ecosystem

coral reef: a hard natural structure under the sea that is formed from coral

crude oil: naturally occurring fossil fuel also known as petroleum from which we obtain petrol diesel and many other useful products

Greater Antilles islands: Cuba, Hispaniola, Jamaica and Puerto Rico

Lesser Antilles islands: small islands in the Caribbean Sea extending from the Virgin Islands and
Grenada

mangrove: It is a tropical vegetation that grows in saline coastal areas and a large part of the plant remain submerged in water. It has breathing roots, which grow above the ground as the soil does not provide enough oxygen to the underground roots.

rainforest: dense forests of evergreen trees found in tropical zones receiving heavy rainfall as in the equatorial regions 

runoff: rain or water that runs off land into streams and rivers

sandbar: a raised area of sand in a river or sea that is just below the surface of the water or that sticks out of the water slightly

spit: a long narrow area of land that stretches out into the sea or a lake