No, these are perfectly fine and are aquilonastra stars. In some cases their numbers can grow, but they eat algae, detritus and will be the first on the scene if there's a stressed or dying coral (to clean up).
No, these are perfectly fine and are aquilonastra stars. In some cases their numbers can grow, but they eat algae, detritus and will be the first on the scene if there's a stressed or dying coral (to clean up).