Mesophyllum expansum

Mesophyllum expansum is a species of red alga belonging to the family Hapalidiaceae.
Description.
"Mesophyllum expansum" can reach a diameter of about . Illuminated by artificial light they show a beautiful pink color, with hanging branches. These calcareous encrusting organisms can be observed occasionally near the surface and can reach a depth of .
Distribution.
This species is widespread in the Mediterranean Sea.