Marine life appeared in the form of fish, which live exclusively in water. Some of these evolved into amphibians which spend portions of their lives in water and portions on land. Other fish evolved into land mammals and subsequently returned to the ocean as seals, dolphins or whales. Plant forms such as kelp and algae grow in the water and are the basis for some underwater ecosystems. Plankton, and particularly phytoplankton, are key primary producers forming the general foundation of the ocean food chain. Marine invertebrates exhibit a wide range of modifications to survive in poorly oxygenated waters including breathing tubes (see
Department of Agriculture, Food and the Marine "virtually wipe out" agri-food trade to BrRitain, according to the Irish Farmers' Association president Joe Healy. Department of Agriculture, Food and the Marine The Department of Agriculture, Food and the Marine (DAFM) () is a department of the Government of Ireland. The mission of the department is to lead the sustainable development of a competitive, consumer focused agri-food sector and to contribute to a vibrant rural economy and society. It is led by the Minister for Agriculture, Food and the Marine who is assisted by one Minister of State. The official headquarters and ministerial offices of the department are in