Found in about 6m - confident ID, despite apparent missing arms.
Snorkel northward of the marina at low tide with mainly good visibility which however varied greatly from place to place, due factors such as thermal layering, detritus lifted by mild whirlpool effects of tide and topography, and distance from shore.
Note added 29/6/2024
This might be the same individual as obs 106433160 but taken a half hour later.
Low tide mid AM - Wide low gradient high tide beach. Found on mid shore washed up. Normally all sand but significant Seaweed mounds this visit.