Wave
Rooster tail
The plume of spray thrown up where the boat's wake converges behind the transom, a visual marker of the wash directly behind the boat.
The rooster tail is the fan of water spray that shoots up behind a wake boat where the two sides of the wake meet. While more of a wakeboarding feature behind the boat, it visually marks the seam of converging wash directly astern, the area a surfer must cross during a transfer and the heart of the fall zone.
For wakesurfers the rooster tail mostly serves as a reference for where the clean wave ends and the messy converged wash begins behind the boat.