Three principal feeding patterns have been described for nemerteans, namely suctorial feeding, macrophagous feeding, and suspension feeding (McDermott and Roe, 1985).
In general, Procephalothrix simulus consumed entire prey organisms rather than taking fluids and tissues from inside the prey, thus showing a typical macrophagous feeding strategy.
Nemerteans that use the macrophagous feeding strategy have been known either to catch their active living prey with their proboscis, killing or at least partially immobilizing it with the proboscis secretions before ingestion, or to feed directly on inactive or decaying food material without prior use of the proboscis (Gibson, 1994).
For other macrophagous nemerteans, Jennings and Gibson (1969) reported that the ingestion process of L.
Average capsule length of the tentacle spirocysts increased continuously and significantly with increasing polyp size in all three macrophagous anemone species (Figs.
senile, the length of tentacle cnidae increases more slowly with body size (scaling exponents, 0.008-0.03, Kramer and Francis, 2004) than for macrophagous Anthopleura and Tealia species (scaling exponents, 0.052-0.086, this study).