Hydrophilus piceus is a species of beetles in the family Hydrophilidae, the water scavenger beetles. This very large aquatic beetle is found in the Palearctic and is known by the common name great sil

Hydrophilus is a genus of beetles in the family Hydrophilidae, the water scavenger beetles. There are 53 species in three subgenera in the genus: Hydrophilus, Dibolocelus, and Temnopterus.