I would assume this is a new tank from what I see there are duster shoots very common in a new tank , you can suck them out as yes all those shoots can get ugly , but they are harmless , if you had hydroids /vermid snails/or spinoid worms you would know it, there shoots are short and have a more white look to them , been there done that , your tank IMO is too young for them any way unless your over feeding and fueling them