Great pic... if no one in the RSM club makes an id, try in this RS forum
Reef Hitchhiker ID
I will be watching & learning too - new one to me
Researching... a bit, this may be the answer... see what others think
Mushroom Coral Reproduction
Coral Anemones have four forms of reproduction; budding, laceration, division or fission, and sexual reproduction. Asexual budding, laceration, and division are successful in the aquarium, as most hobbyists soon discover. It has been stated that the warmer end of their temperature spectrum encourages reproduction.
Budding: Here individuals are formed from particles divided off from the pedal disc. This is when the mushroom will allow a small piece of totipotent tissue to grow and form from the parent, which in turn becomes a new animal.
Laceration: Laceration happens when they move slowly over the surface and leave behind small pieces that will eventually form into mushrooms.
Division / Fission: Similar to budding, fission is where an individual divides down the center and forms two animals. They basically split themselves right in half at the mouth and will then wrap back around themselves to create 2 smaller versions within a few days.
Sexual reproduction: Sexual Reproduction is where eggs and sperm are released into the water column. They unite and form free-swimming larvae which are initially plankonic, and them settle and adhere to the substrate. Sexual reproduction has not been well documented, and has not been observed in captivity. Presumeably modern filtration methods are inhospitable to free swimming larvae.
Extract above ^
Mushroom Coral Information, Corallimorph Types of Mushrooms
