There are many animals in the ocean ecosystem. Here are some that I remember from the top of my head for right now. They are:
An ecosystem is a place where plants and animals ( maybe humans ) live and animals and plants live in the desert so … 
There are changes brought up in animals and plants. It is due to evolution.
They are plants, animals, and organisms.
Plants, specifically through photosynthesis, are alive and provide oxygen for animals in the ecosystem. This process involves plants absorbing carbon dioxide and releasing oxygen as a byproduct, which animals then utilize for respiration.
the living parts of an ecosystem is generally called the biotic
An ecosystem is a place where plants and animals ( maybe humans ) live and animals and plants live in the desert so … 
Show a ecosystem diagrams about animals rain forest rivers plants?
by cooperating
plankton
How does what influence animals in the ocean?
So the animals that eat plants can eat plants and won't run out.
There are changes brought up in animals and plants. It is due to evolution.
Stuff like animals and plants
they are biotic because they have a ecosystem
there will be no ecosystem
They are plants, animals, and organisms.
animals role in the ecosystem is to produce carbon dioxide(C02) and then the plants breathe the co2 in and produce oxygen that we breathe oxygen=animals breathe in co2 =plants breathe in co2 =animals breathe out oxygen = plants breathe out