There are basically Three ways used:
If you mean, "are all under water creatures, sea creatures?" then no. The term SEA is for the ocean and there also can be creatures in freshwater. Also some creatures that live in water such as some snakes and sea turtles come out of the water every so often, so they are no total sea/water creatures. Fish are underwater creatures though.
Creatures that live only in water are referred to as aquatic.
They live deep deep under alot of water, at rock bottom, were the water is not blue it is a dark black color.
No
they usually stick their heads in the water and eat little shrimps or tiny creatures that live under the water that are smaller than the duck itself
Lots of creatures live on water like jellyfish,sharks,fish,whales,shrimp,clams,crabs,etc...:)
if only I am a girl
nectonic creatures are animals that live in the water that actually can't swim, they glide propel or padle through the water
yes sea creatures
Not really. Who doesn't want to be a mermaid? You can live under water and swim with awesome sea creatures and date mermen. What's not to like?
yes , they do live under water :) ]
No, sharks are aquatic creatures and cannot survive out of water.