Cropped from a previous submission. Limited image quality as result. The dangling white 'blob/droplet' form we quite often see as part of ledge roof sponge growths in similar terrain (or maybe these are peculiar types of overgrowing tunicate??...but I'm going for sponge).
Dreadful pic of a juvenile.
Cropped from preceding observation.
The greyish sponge @ centre.
Tentative genus suggestion. Detail of a common sponge species at this location.
Another school of adults in a cave along the northern inner slope of the platform reef.
Sponges growing on oysters in monitoring baskets
Found against swimming pool net
Found in oyster monitoring basket. Includes Sabella spallanzanii
Found in oyster monitoring basket. Also includes a brittleworm
Found attached to an oyster monitoring basket
Probably, juvenile. I'll add a cropped version.
Poor view of mature adult just R of centre.