P. ebeninus, like most other gastropods, are non-selective deposit feeders that feed using a radula located inside of the buccal cavity (Fig 1.; Bishop et al., 2007). These organisms are considered to be a major component in mudflat ecosystems, but can have limiting effects on the feed sources of other macro-invertebrates and can often cause detrimental effects to the trophic food web if found in high densities. Due to that these organisms are detrivores, they typically feed on bacteria and microscopic algae found buried in the sediment. (Edwards, 2009) As it is considered that about 40% of the food web production is decomposed through the trophic levels, it is indicated that adult P. ebeninus organisms in high densities can cause collapses in the trophic energy distributed.  (Duarte & Cebrih, 1996). The P. ebeninus organisms typically do not experience competition in areas of limited food sources, like mangrove pneumatophores, with the exception of abundant mud whelk, Batillaria australis. (Kelaher et al., 2007). Due to their small amount of predators, the detritivorous gastropods negatively effect primary and secondary producers in their environments due to their feeding behaviors.