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
Food and drink in Birmingham A notable development of eating out in Birmingham occurred in August 2012 with the establishment of the "Digbeth Dining Club" (DDC) by the former cameraman Jack Brabant. On a weekly basis a street food market is held at Unit 2 Lower Trinity Street on Friday evenings from 5PM. On 17 and 18 September 2016 the British Street Food Annual Awards was held at the site. From January 2017 the DDC was held two evenings per week, Fridays and Saturdays, with the emphasis on Saturdays being on music and street entertainment. Birmingham has numerous restaurants which are parts of nationwide chains.