mapping red areas larger than minimum size

I am working on a coral filter. I am trying to isolate the red coral over a certain size to attach polyps with Bomber. If you look at the white polyps circled in blue you will see that aside from 'floating' they aren't only near red areas. I have tried using Extract RGB, Threshold and the Median, Maximize and Minimum filters to create a map of just the bigger areas of red but you can see that the polyps are over areas that seem mostly green or blue but in reality may have tiny bits of red -or maybe suring rendering it 'sees' the red layer beneath the blue? Any suggestions on how I can get a more exact placement on the red coral.

Note: The red circles show another 'polyp' placed more exactly after a Smudge thanks to Sphinx and some extra demystifying for my poor brain by Skybase here http://filterforge.com/forum/read.php?FID=18&TID=11034 I am looking for a color based approach to place the white ones in the same way.

That does look more accurate than my efforts. Thanks.