Kelp
Kelps are large brown algae seaweeds that make up the order Laminariales. There are about 30 different genera.
Lessonia trabeculata
Lessonia trabeculata is a species of kelp, a brown alga in the genus "Lessonia". It grows subtidally off the coasts of Peru and northern and central Chile, with the closely related "Lessonia nigrescens" tending to form a separate zone intertidally.