Adaptation by plants in aquatic habitat:
1. Plants floating in water have strong and narrow stems to protect them from being carried away by water currents.
2. Aquatic plants have air chambers in their stem that allow them to float in water.
3. Lotus and water lily have waxy coating in their leaves that prevent them from rotting.
Adaptation by animals in aquatic habitat:
1. Ducks have webbed feet that allow them to float in water.
2. Fishes have gills that allow them to breathe in water.
3. Octopuses and squids make their bodies streamlined that allow them to swim fast and resist the flowing water.