Some aquatic habitats are:
- Seas and Oceans
- Ponds, lakes and rivers.
Seas and Oceans:
- Sea contains saline(salty) water.
- Plants and Animals in the sea are surrounded by salty water.
- And most of them use the air dissolved in the water for their survival.
Animals in Seas and Oceans:
- Animals which are found in oceans have a streamlined body (pointed at the ends and broad in the middle) which help them to move easily in water
- There are some animals who do not have a streamlined shape, these animals are found deeper in the ocean. These animals make their body streamlined when they move in water
- They also have gills which help them to breathe in water.
- They have slippery scales on their body, these scales protect the fish and help in easy movement in water.
- Fishes have fins and tail which helps them to change direction and keep their body balanced
Example - Squid and octopus
Note:
Animals such as dolphins and whales do not have gills , they breathe through nostrils or blow holes which are in the upper part of the head. These animals can stay a long time without breathing inside water and come out at the surface to breathe.
Ponds, Lakes and Rivers:
Plants in Ponds
- Plants which are found in ponds have short roots .
- Main function of these roots is to hold the plant firmly to the soil.
- Stems of aquatic plants are long, hollow and light, they grow up to the surface of water while leaves and flowers float on water.
- Some plants are found totally submerged in water, leaves of these plants are narrow and ribbon-like which can easily bend in the flowing water
Animals in Ponds
- Frog is one such animal which can be found in ponds
- They can stay both in water as well as move on the land
- They have webbed feet which help them to swim in water and strong back legs which helps them in jumping and catching prey
