Both are bodies of water, but oceans are very large bodies of salt water, while lakes are much smaller bodies of fresh water. Lakes are usually surrounded by land, while oceans are what surround continents. Both have plants and animals living in them. The ocean is home to the largest animals on the planet, whereas lakes support much smaller forms of life. When it is time for a vacation, both will make a great place to visit and enjoy. * Oceans and lakes are home to many living things. Oceans and lakes have much in common, but they are also quite different. Lakes are better than oceans because their water is fresh and not salty. Oceans and lakes are great places to visit.