Physiology of Finfish and Shellfish (2+1)

1.2.7. Water as a Major Cell Constituent

Water is the most abundant component of any organism. Humans are 60% water, and most organisms are 60-90% water. The lowest water content can be found in plant seeds (20%), and the highest in jellyfish (99%), and this is the cause of their transparency. The water is found mainly in the protoplasm, and here it plays vital roles in many functions, for example in metabolism in all organisms, and photosynthesis and support in plants.