A spine-cheeked anemonefish (Premnas biaculeatus) swims among the tentacles of its host anemone in Wakatobi National Park, Indonesia.

actiniaria anemone anemonefish animal animal behavior animal head animal themes animals in the wild anthozoa aquatic close up clownfish cnidaria color image colorful coral triangle damselfish day fish front view habitat headshot horizontal ichthyology indo pacific ocean indonesia macro marine biology maroon anemonefish maroon clownfish mutualism national park nature no people ocean omnivore one animal orange osteichthyes outdoors photography polyp pomacentridae premnas biaculeatus red sea anemone sea life soft coral southeast asia species spinecheek anemonefish spinecheek clownfish sulawesi swimming symbiotic relationship tropical fish undersea underwater vertebrate wakatobi wakatobi national park white wilderness wildlife zoology