Class Hexactinellida (Glass sponges) Published September 21, 2020 at 720 × 540 in Porifera Overview Image Gallery: EX1806 – Dive 04 Blake Escarpment South ← Previous Next → One of the larger sponges seen on the dive occurred at the top edge of the scarp wall. This individual had a cavernous osculum (lower left image). Many zooanthids (lower right) as well as a soft coral (top center) were living on the sponge.