What is the difference between freshwater and marine

This is why they can survive in waters with less than 0. Saltwater fish lose water to their surroundings through the process of osmosis. They need to drink lots of salty water to maintain a healthy body, which is why they live in oceans and seas.

There are different varieties of freshwater and marine species. Freshwater fish can be cold water or tropical varieties. Cold water species include pike, trout, shiner and goldfish. Examples of tropical freshwater species are pacu, golden barb, red-tailed red eye puffer, catfish, guppy and angelfish. Marine fish are all cold-water fish.

Marine invertebrates including crabs , worms, mollusks, corals , jellyfish, etc. Bony fishes and cartilaginous fishes , turtles, dolphins and whales are the marine vertebrates found in marine ecosystems. Unlike the freshwater animals, surroundings of marine animals have very high amount of salts. Because of the high concentration of salts, osmoregulators living in marine waters face the biggest problem of dehydration water loss.

To avoid this problem, these creatures uptake large amount of sea water and expel salt in that water across their gills and skin. In addition, the marine fishes expel a large amount of calcium, magnesium and sulfate ions with very small amount of water through the urine. Freshwater animals the animals live in freshwater ecosystems like lake, ponds, etc. Yashoda Ramyajith Somarathna holds a B. These elements are greater electricity conductors. So electricity passes through this water more efficiently and quickly than it could in freshwater.

A freshwater ecosystem consists of streams, wetlands, ponds, lakes, and rivers. These are composed of generally animals and plants that are unable to thrive in highly saline water. Thus in freshwater, they can easily survive.

Some of these sources are more diverse than others, as some might be isolated from other water sources. Marine ecosystems are more diverse than freshwater ones. They include salt marshes, wetlands, estuaries, mangroves, and give accommodation to various different kinds of animals and water plants.

But they are much more sensitive. And mass human pollution is causing more damage day by day in the marine life. Marine water can actually be deadly if you drink it. Being wrecked in the sea will bring a very high risk of getting dehydrated because drinking the salt takes more liquid from the cells to balance out saline level.