Mozuku is a collective term for various types of Japanese brown algae from the family Chordariaceae, which are used as food. These include ito-mozuku (Nemacystus decipiens), Okinawa mozuku (Cladosiphon okamuranus), ishi-mozuku (Sphaerotrichia divaricata) and futo mozuku (Tinocladia crassa). Occasionally the aquatic flowering plant Hydrilla verticillata is referred to as mozuku.
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