FIGURE 35 in Sponges associated with octocorals in the Indo-Pacific, with the description of four new species

FIGURE 35. Oceanapia fistulosa (Bowerbank, 1873). A, Sponge (black arrows) covered by Alertigorgia hoeksemai (white arrow) in situ; B, Magnification of the pinkish surface of the fistule free from the octocoral; C, Section of a sponge fistule (S) covered by the octocoral (O); D, Ectosome composed of a tangential reticulum of oxeas; E, Longitudinal section of a fistule showing longitudinal thick tracts of oxeas (black arrow) and tracts supporting the ectosome (white arrow); F, Section of a fistule of the sponge (S) covered by the octocoral (O); spicule bouquets not present, and the arrow indicates the boundary between the sponge ectosome and the medulla of the octocoral; G, Oxea I; H, Oxea II.