Tetrapocillon kurushimensis is a species of demosponge belonging to the family Guitarridae.
The species was first described in 1961 by Senji Tanita,Tanita, S. (1961). Report on the sponges collected from the Kurushima Strait, Seto Inland Sea. Memoirs of the Ehime University, Sect II (B), 4: 335–354
The species epithet, kurushimensis, describes it as being found in the Kurushima Strait of Japan. It is also found in seas off the Korean Peninsula.
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