WATER LIFE

Life develops not only on land but also in water. In water we can find many species of plants, animals and even protistów and sponges.

Aquatic plants are a special and heterogeneous group of plants. They usually include coastal plants (the root zone can be continuously or periodically flooded by water), and plants floating freely in water or on the surface.

Algae are placed in the sea in a very characteristic way called a vertical arrangement.
It depends on the photosynthetic pigment contained in the body.
That is why the green algae grow in the shallowest water reservoirs which are of a green
color. They have a green pigment called chlorophyll. A little deeper live red algae because they blue light in the process of photosynthesis due to blue pigment called phycoerythrin; due to this fact thier thallus is red in color. The brown algae grow in the deepest areas of sea and "feed" on yellow and green light. A brown pigment called fucoxanthin enables these plant to grow and live that deep.

- Living near bodies of water, for example, a heron;
- Semi-aquatic: for example, a frog;
- Aquatic: for example, fish.
Other aquatic animals include water fleas, crabs, crayfish, lobsters, dolphins, killer whales,
sharks.

Protists are mostly single cell organisms, of different morphological features and the size of a few millimeters. Their body consists of front, back, a notochord. The protists usually
use oxygen to breathe, resulting in the gas exchange with the entire surface of the cell.
Slime molds, hydra, plant-protists, cyanobacteria - protists living in the aquatic environment.