an abstract from this month's reefkeeping online magazine.
There are two widely recognized species of Ricordea, R. florida from the Atlantic and Caribbean, and R. yuma from the Indo-Pacific region. Both are very popular in the aquarium trade. Ricordea yuma is readily distinguished from R. florida by the fact that the former has pseudotentacles on the ###### cone, while the latter does not. Also, R. florida often has numerous mouths and elongated irregular polyps, while R. yuma is usually circular, with one mouth. All are spectacular due to the grape-like tentacles on their ###### disc, but some especially prized specimens have brilliant fluorescent proteins in shades of orange, red, pink, blue, and green.
the original article on Corallimorpharia can be found here.
happy reading.