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.
planktons.
fish
Basically all that he does!
Any type of water But mostly in the sea because it says it in the name SEA CREATURES but basically in any body of water.
The Sea horses predators are humans at fish that eat all under water creatures
Dead Sea is made out of water.
The underside of the top of the water, pirate gold, crashed planes, rocks, dirt, shells, and various other sea creatures.
Sea creatures breathe underwater using gills, which extract oxygen from the water. Gills are equipped with thin membranes that allow oxygen to pass through and carbon dioxide to be released. This process enables sea creatures to extract oxygen from the water in order to survive.
the sea is made of water and sand. filled with amzing creatures.~sami~
yes sea creatures
a under water sea mount is something under water almost like hill