This is Hercules the carrot!
Clearly, this carrot has been focusing on growing muscles rather than legs.
Do you have vegetables in your garden than grow in all different shapes? We don’t often see these vegetables for sale in a supermarket but they are still perfect to eat… There is no reason to waste good food just because of their atypical appearance!
The reason why Hercules has grown into a fork-like shape is because the soil is too nutritious, encouraging the roots to grow out rather than straight down to look for nourishment.
To encourage carrots to grow straight and long, mix some sand or ash into the soil and do not use too much organic fertilizers.