Kaipen - (Lao:Kaipen - (Lao: , Isan: , Lao pronunciation: [kj.pn]), dried sheets of edible Mekong River algae, similar to nori, Isan: , Lao pronunciation: [kj.pn]), dried sheets of edible Mekong River algae, similar to nori. Latin name Cladophora. Eaten along the Mekong in Laos and Thailand