Appearance
''Thysanozoon nigropapillosum'' has a long body and broad shape. They grow up to 3 in . The dorsal surface is deep black and covered with numerous yellow-tipped papillae varying in size. The ventral surface is dark brown. The outer margin of the body is slightly wavy and bordered in opaque white. They have small, ear-like pseudotentacles in the middle of the anterior end. They swim by propelling themselves through the water with a rhythmic undulating motion of the body.
Distribution
This species is widespread in the Indo-Pacific.
Habitat
''Thysanozoon nigropapillosum'' is quite common along the external reef.References:
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