Description: Posidonia Oceanica (commonly known as Neptune grass or Mediterranean tapeweed) is a plant that grows only in the Mediterranean and Caribbean seas.
The plant releases tiny fibres which, during their journey to reach the shore, bind together to form small, hairy pebbles. These pebbles are collected and joined to create a large single necklace.
A strand of the plant was discovered to measure 8 kilometres in length and has been growing for at least 100,000 years - making it the biggest and oldest living organism in the world today.
Circumference approx. 5 m