Fishtail may refer to one of the following
- Biology
- The rearmost fish fin or caudal fin
- Fishtail palm (genus Caryota)
- Fishtailing, a problem in car handling
- Fishtail Air; see List of airlines of Nepal
- Places
- Fishtail, Montana, a town
- Fishtail Point, southernmost point of Shults Peninsula in Antarctica
- Fishtail Lake, lake on Vancouver Island in British Columbia, Canada
- Fishtail Rock, a geologic feature on Hoi Sham Island, a former island near Hong Kong
- Fishtail Butte; see List of mountains in Stillwater County, Montana
- Fishtail Lagoon, a body of water in the Keyhaven, Pennington, Oxey and Normandy Marshes
- Machapuchare, "Fish's Tail", a mountain in Nepal
- Tools
- Fishtail (tool), a wood carving tool
- Fishtail gauge
- Fishtail, the golden timing constraints company
- Clothing
- Fishtail parka, a type of anorak such as the US Army's M-65 parka
- Fishtail skirt
- Fishtail back trousers, a high back design for trousers that is designed for use with Suspenders (American English, Canadian English) or braces (British English).
- Fishtail wrap, a style of folding or draping a sari
- Culture
- Fishtail (Quickstep), a Quickstep dance figure
- A form of the scrollwork graphic design
See also
- Fish tale (disambiguation)
- Lobster Trap and Fish Tail, mobile by American artist Alexander Calder
- Fish Tail Blues, a blues song attributed to American musician Jelly Roll Morton