How do jellyfish overcome osmosis?

Question

Julian Aguilar · Accepted Answer

It is because the sea water seems isotonic to them.

For many marine invertebrates, like the jellyfish... osmosis causes no problems for them, simply because the concentration of solutes inside their cells, matches that of the concentration in the sea water they reside. This means that there is no net movement of water in and out of the organisms cells.

This video discusses the changes which occur in plant cells when they are placed into hypertonic and hypotonic solutions. Not exactly jellyfish, but the principles of what is going on is the same.

Hope this helps!

Clara Atchley · Answer

undefined Jellyfish have cells called cnidocytes that allow them to regulate their osmotic balance. These cells contain organelles called nematocysts, which are used for defense and capturing prey. The cnidocytes have a specialized mechanism to regulate the water and ion balance in the jellyfish, allowing them to adapt to changes in their environment and maintain their internal balance. This mechanism includes the use of transport proteins and ion pumps that control the movement of ions and water across the cell membrane.