The Clarkii Clownfish from the Coral Sea, is also known as the Clark's Anemonefish or Clark's Clownfish. It has a reddish-brown base color with white stripes and an orange forehead when full grown.  The juvenile fish are yellow in color with three white stripes on each side of the body. The anal fin is white with a yellow stripe on the top and bottom. Clarkii Clownfish is one of the most hardy, and therefore, one of the most common clownfish in home aquariums. A 30 gallon or larger aquarium containing an anemone of any type is desirable. It is semi-aggressive towards other clownfish and passive tank mates.