A blue starfish, Linkia laevigata, clings to coralline algae on a reef in Sulawesi, Indonesia.

algae animal animal limbs animal themes animals in the wild aquatic asteroidea beauty biology blue blue starfish climate change close up color image coral triangle corallinales coralline algae day echinoderm ecology ecosystem habitat horizontal indonesia invertebrate linckia laevigata majestic marine biology nature no people ocean one animal outdoors pacific ocean photography raja ampat red algae reef remote location rhodophyta science sea sea life sea stars southeast asia species star shape starfish sulawesi symbiosis symbiotic relationship tropical climate undersea underwater valvatida wilderness wildlife zoology