These beetles are unique in the sandy beach ecosystem. They range around 5.0mm to 6.0mm in length and have a distinct red appearance with black elytra and abdomen. E. basilis can be found mainly near cliff sides underneath terrestrial (wood) and kelp detritus. Not much is known about their diet, though they are suspected to consume primarily decaying arthropods. These beetles are also toxic to consumption, which is a shared characteristic within the Endeodes genus.