What is the meaning of Catshark?

Any of the sharks in the family Scyliorhinidae

A deepwater catshark (any of family Pentanchidae).

A coloured catshark (any of family Atelomycteridae).

Any of several sharks of the family Pseudotriakidae.

A finback catshark (any of the family Proscylliidae).

Source: wiktionary.org