Catshark may refer to:
Scyliorhinidae, a family of ground sharks, many species of which are commonly referred to as "catshark". Pentanchidae, a family of ground sharks with the overall name deepwater catsharks, but many species are referred to as "catshark". This species in this family were formerly included in the Scyliorhinidae. Atelomycteridae, a family of ground sharks with the overall name coloured catsharks, but many species are referred to as "catshark". This species in this family were formerly included in the Scyliorhinidae. Pseudotriakidae, a family of ground sharks with the overall name false catsharks. Proscylliidae, a family of ground sharks with the overall name finback catsharks, but all species are referred to as "catshark". Bullhead shark, a family and a genus called in Japanese