40ft – 12m
This observation is for the brown sponge. This sponge was seen in a cave and was less common than the light orange sponge.
3-4m
This is was an unusual sponge and was only seen once towards the end of the snorkel. It was tough, rubbery and not compressible.
2-4m
Brown bowl sponge? I’ve never seen one so shallow or deformed.