The saltiest sea in the world is the Dead Sea.
The Dead Sea is a landlocked lake that is located between Israel, Jordan and the West Bank.
The Dead Sea also has a significantly higher level of salinity than the ocean.
The deepest ocean in the world is the Pacific Ocean with the deepest part being the Challenger Deep.
The Challenger Deep part of the Pacific Ocean is located below the western Pacific Ocean in the southern end of the Mariana Trench and runs several hundred kilometers southwest of the U.S. territory island of Guam.
The warmest sea in the world is the Indian Ocean.
The Indian Ocean has an average temperature of 72 F to 82 F and is warm because the Indian Ocean is mostly located in tropical regions and does not have a cold or temperate zone in the Northern Hemisphere.
The Caribbean sea is one of the cleanest seas and oceans and is so clean because it has minimal river sediment input as a result of the small landmass that surrounds it.
The presence of corral reefs also filter the water and strong tidal currents prevent sediment build up and a lack of large amounts of plankton in the warm tropical waters result in the Caribbean sea having clearer water and fewer suspended particles.
Unlike many of the coastlines the Caribbean Islands have little landmass and few large rivers, which means that less sediment is carried into the ocean.
Warm tropical waters in the Caribbean also tend to have lower levels of plankton that can contribute to turbidity in other ocean regions.
And the white sand that is prevalent in the Caribbean also contribute to the appearance of clear water by reflecting the light.
The clearest water in the world is at Prassa Beach, Greece which is located on the Island of Kimolos and is known for it's white sand and clear water.
Thingvellir National Park, Iceland is also a place with the clearest water in the world.
The separation of the North American and Eurasian tectonic plates created fissures filled with glacial melt water and a natural aquifer.
The water at Thingevellir National Park is so clear that you can drink it while swimming.
The clearest water in America is the Schoolhouse Beach on Washington Island In Wisconsin.
The schoolhouse beach is located in Door County, Wisconsin and is a scenic and underrated vacation destination.
The schoolhouse beach features a rocky limestone shoreline, a popular swimming spot and views of Washington Harbor.
The shores of schoolhouse beach are made up of small limestone rocks which have been polished by glaciers and years of erosion from Lake Michigan.
Taking a rock home from schoolhouse beach is said to bring bad luck and can get you up to $250.00 fine per each stolen rock.
Oceans are also considered to be dirtier than pools.
Oceans are large bodies of water which can be contaminated by plastics, agricultural runoff, sewage etc.
Pools are often regularly treated and cleaned with chlorine which keeps them clean.
Bacteria can thrive in the oceans although the saltiness of the ocean can sterilize it someone.
Pools are also safer than oceans as oceans can pose some dangers such as jellyfish, sharks, other sea creatures and even waves and riptides that are unpredictable and can threaten even the strongest of swimmers.
The ocean is sanitary to swim in.
For example the vast majority of ocean waters such as along the coast of Los Angeles County meet State ocean water quality standards.
The only exceptions are areas that are adjacent to or in front of discharging storm drains and after major rainstorms.
Swimming in the ocean is significantly more challenging than swimming in a pool or most other places because you must contend with waves, the change of the tide, the slope of the beach, and strong currents that may be present even when the surface of the ocean appears calm.