Semiaquatic

Semi-aquatic animals spend part of their life on land, and part in the water. Such animals include:
Some insects, for example dragonflies spend part of their life in the water
Whirlygig beetles live on top of the water.
Amphibious fish spend some of their life on dry land.
Many tetrapods spend extended periods of time in the water
Amphibians (toads, salamanders, newts) need a wet skin for the life stages they spend outside the water
Many crustaceans live on the seashore, and at lakesides, and have adapted to being submerged.
Some spiders. 
Some plants have also adapted to being both in the water and on land.

Category:Ecology