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The Marine biome is the biggest biome in the 

world!   It covers about 70% of the earth.   It 

includes large oceans such as the Pacific, the 

Atlantic, Indian, and Arctic among others and,  

gulfs and bays. 

Location:

The ocean is divided up into 3 vertical zones.  

The top layer is called the euphotic zone and 

it is the area of the ocean where light can 

penetrate.   The next layer is the disphotic 

zone which is the too deep for lots of light to 

reach.  

The deepest part of the ocean is called the 

aphotic zone, or deep sea. The deep sea is 

made up of   80% of all the habitats on earth, 

which makes it the largest habitat on the 

planet.

Weather:

The marine biome has a big influence on our 

land climate.   It provides rain for crops through 

evaporation, wind to help circulate the air, and 

it affects coastal temperatures.   The ocean is a 

big influence on whether the weather will be 

sunny or cloudy. 

Temperatures in the ocean range from just 

around freezing at the pole and in the deep 

waters, to tropical clear waters that are as 

warm as your bathtub. The average 

temperature of all oceans is about 39 degrees 

Fahrenheit. 

Plants:

Over 1 million species of plants and animals 

have been discovered in the oceans.   One 

reason the ocean is very important is because 

of all the algae. Through photosynthesis, 

marine plants and algae provide much of the 

world's oxygen supply and take in huge 

amounts of carbon dioxide. 

One type of algae is kelp.   It is important 

because it provides shelter and food for a lot of 

sea creatures. 

Another important marine plant is 

phytoplankton.   These are tiny plants that 

serve as food for many of the ocean creatures 

form the smallest of fish to large whales. 

Marine plants live in the euphotic zone of the 

ocean because they need energy from the sun 

for photosynthesis.

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