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".