Gullet

"But the foolish boy let Vermax be hooked like a trout and dragged into the sea, where he soaked up even more arrows than seawater."

- Viserys Targaryen The Gullet is the stretch of water in the Crownlands between Dragonstone and Driftmark. Blackwater Bay opens into the Gullet, which connects with the Narrow Sea.

History
During the Dance of the Dragons, the Battle of the Gullet took place here. Upon receiving the news of the death of Rhaenys Targaryen, Rhaenyra Targaryen entered panic, believing that a direct attack on her headquarters in Dragonstone was imminent she ordered her two youngest children, Aegon and Viserys ride their dragons and cross the Narrow Sea.

But when a few days after the children were flying over the Narrow Sea they were intercepted by the fleet of Triarchy surrounding Blackwater Bay. Prince Aegon was barely able to return alive to the coast of Dragonstone with his badly wounded dragon, while his younger brother had been captured by the enemy fleet.

Determined to rescue his brother, the eldest son of Rhaenyra, Jacaerys, defied the orders of his mother and rode his dragon to face the Triarchy over the sea. But Jacaerys did not expect that the invading fleet was ready to face the dragons, and they caught his dragon with an arpon in its claw, forcing him to fly to the waves, where rider and dragon were exterminated.

In the books
During the Dance of the Dragons, the Gullet was blockaded by the fleet of the Sea Snake, Lord Corlys Velaryon. The greens broke the blacks' naval superiority with the Battle in the Gullet, however.