Porifera Hexactinellida (Glass Sponge) Published September 21, 2020 at 720 × 540 in Porifera Overview Image Gallery: EX1806 – Dive 04 Blake Escarpment South ← Previous Next → Various unknown species of glass sponges were seen growing from small patches of dead coral rubble at depths ranging 1283 to 1313 m. Those shown here may be the same or related species.