Images of the freshwater sponge observed previously by Scott Gavins:
https://inaturalist.ala.org.au/observations/66910941
https://inaturalist.ala.org.au/observations/66910934
https://inaturalist.ala.org.au/observations/92301554
I could observe some of the spicules presented here but it was a low yield from the preparation process I trialled. Skeleton spicule is slightly curved, possibly with tiny spines. The dermal spicules are stellate.