Calcareous red seaweed. by Bernard Spragg. NZ Via Flickr: Corallina officinalis is a calcareous red seaweed which grows in the lower and mid-littoral zones on rocky shores. It is primarily found growing around the rims of tide pools, but can be found in shallow crevices anywhere on the rocky shore that are regularly refreshed with sea water. It predominantly grows on the lower shore, especially where fucoid algae are absent, but is also found further up shore on exposed coasts.
Rainbow Seaweed ~ Greymouth, NZ by Steve Reekie Via Flickr: After rough seas, with favourable ocean currents, a variety of seaweed can sometimes wash up on West Coast beaches, adding colour to the already colourful stones at the waters edge. This was all collected in one short beach walk at Paroa, just south of Greymouth.