Global ocean surface temperatures are the warmest since records began. (sustainablebusiness.com)
Across the oceans, the average global ocean surface temperature during November 2017 was 0.62 °C (1.12 °F) above the 20th century average of 15.8 °C (60.4 °F)-- the fourth highest November temperature in the 138 - year record. (ncdc.noaa.gov)
By the end of this century, global ocean surface pH could decrease by a further 0.3 — 0.5 units [1,2]. (rstb.royalsocietypublishing.org)