The three big ones that first come to mind are:
1) Lungs - Obviously you would need to breath air in some manner before you could venture out of the water
2) Self-moisturizing skin - Your skin would dry and crack without access to water unless it had natural oils that moisturized it.
3) Structural support - Your body would collapse under the weight of gravity if it did not have a skeleton that could provide you with structural support and a means for locomotion. Even fish with rudimentary lungs have bony forelimbs that they use to propel themselves around on land.
A aquarium xD
Antarctica is a continent. No sea creatures live on land.
it has gills
no
No not all land and sea creatures are warm blooded
The first reason sea creatures are killed off is the same reason land creatures are killed off; if they were not killed off, the world would be overrun with them. Food is another reason sea creatures are killed. Life is largely about eating and not getting eaten. Most creatures are killed as a food source. Pollution is another reason sea creatures are killed.
see land animals have to breathe on land...of course,and sea creatures have Gils which are used to breathe under water but their are some land and sea animals such as frogs or aquatic turtles
sea of course because there's more water on the earth than land so there's more animals in the water than land
because we need to know what is in the sea
...a good thing for air-breathing creatures.
Tasmanian devils live on land. They are not water-dwelling creatures of any description.
Food chains exist on the land and in the sea. Tiny plants in the oceans are the ultimate source of food for all sea creatures.
Sea turtles can't walk on land easily because of their flippers. Land turtles can swim, but not as gracious and swiftly as a sea turtle.