Holothuria (Platyperona) difficilis is a species of sea cucumber in the family Holothuriidae.

[4] It has been hypothesized these defense mechanisms, that animals such as Holothurians have, are due to evolution against predation.

When observed in Western Australia, it was found that H. difficilis that resided there were deposit feeders, where the species grazed on rocks and ate sediment.

The mechanism by which H. difficilis feeds is unknown but other Holothurian deposit feeders have different shaped tentacles that catch food.

[6] H. difficilis, along with other species in the Holothuria genus living in the southern hemisphere have specific reproductive schedules.

Asexual reproduction was at its highest in the winter season which correlated with lower water temperatures whereas sexual reproduction was at its highest in the late spring to summer seasons which correlated with warmer water temperatures.