 Studies into the macroscopic algal preferences of "T. funebralis" revealed a strong preference for "Nereocystis luetkana" and "Macrocystis integrifolia".Macroscopic algae species preferred by "T. funebralis" are similar in that they are non-calcareous, non-filamentous, and softer in comparison to other macroscopic algae in the region.These species do not grow in the intertidal, so they are only available to "T. funebralis" as drift material.