Probably D. dichotoma var. intricata
Abundant (approx. 1 egg mass per linear metre over 200m)
IDing the tufted (red?) algae on the right hand side in the middle
IDing the tufted (red?) algae on the right hand side in the middle
IDing the fish in the middle
IDing the fish in the middle
IDing the tufted (red?) algae on the right hand side in the middle