The structure of a gorgonian colony varies. He suspects it to be in the Gorgonian Grotto. It is covered in golden laminaria kelp and numerous gorgonian sea fans. They are planktonic and eventually settle onto other gorgonian corals. It feeds and lays its eggs on the gorgonian branches. Coral types include "various species of stony and gorgonian coral". This symbiotic relationship assists in giving the gorgonian nutrition by photosynthesis. The colouring varies according to the species of gorgonian on which it is living. Leptogorgia festiva is a species of gorgonian sea fan in the family Gorgoniidae. Fiona then looks in her mycological textbooks to research the Gorgonian Grotto. The gorgonian, "Paragorgia arborea", may grow beyond three meters. Each gorgonian polyp has eight tentacles, which catch plankton and particulate matter for consumption.