1. Ocean Ecosystems
Oceans, seas, and some lakes are
examples of saltwater ecosystems.
The amount of salt in each one is not the
same.
Plants and animals live in the shallow
(not deep) parts because the suns shines
more in these areas.

2. Ocean Zones
Oceans are the world’s largest ecosystem.
Water is deeper is some places than in
others and the water temperature also
changes.
The ocean is divided into three zones. The
zones are defined by how much sunlight
they get.
The deeper the water, the colder and darker
it becomes.
Plants and animals can be found in the
areas closer to the surface.

3. Ocean Zones (continued)

4. Animals Found in Saltwater Ecosystems
crustaceans
fish
sharks
sponges
penguins
whales

5. Animals Found in Freshwater Ecosystems
Grebe
Turtle
Trout
Puffer fish
Otter
Pelican
Bullfrog