Red tide at background level February 6, 2018 | Leave a reply Karenia brevis, the Florida red tide organism, was detected at a background level in one sample in Manatee County for the week ending Feb. 2. For more information about red tide in Florida, go to myfwc.com/redtidestatus. More from The IslanderMarch 27, 2018 No red tide detected in ManateeDecember 12, 2017 Red tide at background levelsNovember 21, 2017 Red tide at background levelsNovember 7, 2017 Red tide detected at background levels