A bright orange emperor shrimp (Periclimenes imperator) sits on top of a nudibranch, Lembeh Strait, North Sulawesi, Indonesia.

animal animal themes animals in the wild aquatic arthropod bright caridea close up color image colorful commensal shrimp commensalism crustacean decapoda emperor shrimp extreme close up high angle view horizontal indo pacific ocean indonesia lembeh strait macro malacostraca marine biology no people north sulawesi nudibranch on top of orange outdoors palaemonidae periclimenes periclimenes imperator photography prawn rhinophore sea life shrimp southeast asia symbiosis symbiotic relationship two animals underwater wildlife zoology