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Hexactinellid sponge Rossella fibulata with perched crinoids at New Harbor at 140 feet depth. during Paul Dayton's benthic ecology research project. near McMurdo Station, Antarctica.March 1978

Hexactinellid sponge Rossella fibulata with perched crinoids at New Harbor at 140 feet depth. during Paul Dayton's benthic...