Fishtail (tool)
In woodworking, a fishtail is a type of chisel with a flared blade that resembles the tail of a fish.
They are used for light wood finishing, lettering, skimming, and modeling. They can be used to reach in tight places where a full-width gouge would not fit.
In gardening, a fishtail spade has a flared triangular blade combining the versatility of the Dutch hoe and power of the common round point shovel into a multipurpose tool.