In the Mediterranean Sea, where the water is relatively warm, with temperatures

ranging from 12 degrees celcius (54 degrees farenheit) in winter to 28 degrees celcius

Coralline seaweed	Tubular green seaweed	Sea lettuce

a kind of pavement about 1 metre (3 feet) in depth.

Some kinds of seaweed require extremely clean water, while others can

adapt to mild degrees of pollution e.g. the sea lettuce.

Cloudy water reduces the penetration of light and the development of the

seaweed is therefore limited.

stiff filaments strengthened by calcium. Along the edge of the shore, these sea weeds form

calcium salts, such as the coralline seaweed. They either have a hard shell or possess

(82 degrees farenheit) in summer in sheltered inlets, there are many seaweeds that contain