Estuaries are areas where fresh water from rivers meets salt water. As the river drains, it carries much nutrient-rich sediment. Many animal species depend on this food source to provide for their young.
If you don't ingest enough amino acids you would have difficulties
synthesizing protein. Basically, there are 20 of them in the genetic
code and they build into everything because they are combined into
proteins. They are the second most found molecule in our body after
water, and you need a lot of them. If you don't get them your body won't
have enough protein and you can die if it becomes too extreme.
