There are no species-specific conservation actions directed towards Clarias sulcatus. More information on the distribution, biology, population size and trends, and the current and potential threats to this species is needed. The entire range of this species is included within a forest reserve (IUCN and UNEP-WCMC 2019). However, there are no regulations pertaining to the extraction of this species in the protected area, and the protected area is in place primarily to prevent logging.
This species is restricted to Redang Island off the northeastern coast of Peninsular Malaysia, where it is endemic (Ng 2004).
There is no information available on the population and its trend for this species. However, the type locality for this species has been destroyed due to development (Ng H.H. pers. comm. 2019). Additionally, sampling in 2018 yielded only two individuals (A. Ahmad pers. comm. 2019).
This species is threatened by habitat loss because the island is undergoing tourism-related development that is resulting in the abstraction of both surface and groundwater (A. Ahmad pers. comm. 2019). Additionally, airport development may result in habitat loss (A. Ahmad pers. comm. 2019).