Emperor shrimp (Periclimenes imperator) on a sea cucumber, Anilao, Philippines.

anilao animal animal themes animals in the wild aquatic arthropod close up color image colorful commensal shrimp commensalism crustacean decapoda echinoderm emperor shrimp extreme close up holothuroidea horizontal imperator commensal shrimp macro malacostraca marine biology nature no people outdoors palaemonidae periclimenes imperator philippines photography pontoniinae prawn purple sea cucumber sea life shrimp side view southeast asia species spotted symbiosis symbiotic relationship two animals undersea underwater wildlife zoology