Ponds are included into
- freshwater ecosystems.
- saltwater ecosystems.
Seas and oceans are included in
- freshwater ecosystems.
- saltwater ecosystems.
In freshwater ecosystems, you can find
- snails, frogs and worms.
- sharks, crabs and
Plankton is an organism that
- floats on the water.
- floats in the water.
The main difference between freshwater and saltwater ecosystems is
- sugar.
- salt.
In saltwater ecosystems you can find
- whales and nekton.
- frogs and birds.