Waikīkī Aquarium
Gracilaria coronopifolia

Limu Manauea.

A reddish-brown branching limu and a star ingredient of traditional ʻahi poke.

Red algae

Limu manauea is a reddish-brown branching algae and one of the most prized limu in Hawaiian cuisine — it is a defining ingredient of traditional ʻahi poke.

It is also the natural source of agar, used worldwide as a vegetarian gelling agent in everything from desserts to laboratory petri dishes.

Wild manauea has become rare on Oʻahu reefs and is now mostly farmed in commercial limu ponds. Several restoration projects are working to bring it back to wild reefs.