That's a weird looking wall hammer. Can you post a better pic that shows skeleton- maybe swish the tentacles so they retract fully before taking the shot?
__________________
some common aquarium nuisances: Bryopsis,Derbesia(hair algae),Cyanobacteria(red slime), Diatoms(golden brown algae), Dinoflagellates(gooey air bubbles),Valonia (bubble algae)
|