Video: We explore the 'fifth taste' as Oonagh O'Dwyer takes us on a seaweed hunt

Seaweed, sea algae, call them what you will. Put them in a smoothie, pop them into the bath for silky smooth skin, sprinkle some into a healthy spelt bread, seaweeds are just really good for you. 

These foods grow wild on our shores — you can just wander down to the rocks and pick them and nibble on them.

Every summer in Limerick city a man with a pram sets up shop on the top of William Street and sells bags of periwinkles with a little pin to fish them out, and bags of dilisk for nibbling on.